Russian Girl

I have been dating a girl for over a year. It is a very long distance. We met on a dating website and quickly were happy with our choice of each other. We both canceled our profiles and decided to make a go of it. The first 3 or 4 months were amazing. We spoke all the time. She was attentive and always interested. Everything seemed perfect so I decided I would fly out and we would meet "in real life". Nothing could of been better when we met-We spent an amazing 8 days ago and I left floating on a cloud. As soon as I returned we were already planning on meeting again. Between our first meeting the relationship was strong. She didn't stay up as late talking to me-but I just chalked it up to us settling into a pattern of this long distant relationship and time difference. I flew out 3 months later and we spent 2 weeks together. I popped the question and she accepted! Everything seemed great. Once I caught her in bed talking to a guy on Facebook and I asked her about it. She said it was just some guy from another country that had a crush on her friend from the last time they went on vacation there. I told her "we are laying in bed together and you want to talk to this guy instead of spending time with me?". We had our first argument. During my stay she seemed to dedicate a lot of time to her phone and speaking with people. I was not pleased-I felt like I had traveled very far and did a lot to spend time with her. She didn't seem to understand my position. When I returned from my 2nd trip the relationship seemed to diminish even more. She began to become less interested and spent less and less time talking to me. Answers and questions became less frequent-more silence in between our talk and response. "Going to bed" when in fact I saw she was on social networking sites. We began to have more disagreements and little things began to irritate each other. We thought maybe it was just the distance and not seeing each other. We planned on spending a vacation together on the Sea. Between this plan and actually seeing each other. She had a strange person added to one of her social networking sites. It was an obvious fake-fake photos "an Italian model photo" along with some various other photos-none that would indicate who it really was. The strange thing was this "person" only had one friend on his network-her. I didn't think anything of it and just chalked it up to possibly just a fake stupid profile. When I arrived for my third visit everything seemed ok. Holding hands-some affection etc. We had some good times but there was a lot more times of arguing and disagreeing. Things that had never happened before on the first two visits. Strange one day I saw this "fake profile" write to her when we were sitting by the sea-my heart dropped. I thought it wasn't even real! I asked her what she was doing and she said "Talking to my mom". I said-well you are not telling me the truth-I just say some man write you. I asked who it was and she said "co worker". I said a friend-she said no just a "co worker". I thought it was strange-why is a co worker writing you on vacation? Another time in our trip she was speaking to this "co worker" and her phone was going to die. She told me she had to go upstairs to our room and finish talking to her "mom". Bells were going of in my head. She returned about 15 minutes later as if nothing happened. She confessed to me that she had thought what would it be like if she just stayed in Russia and didn't come to the USA to be with me-but then she said it was just a silly thought in her head she dismissed. She also mentioned that maybe we should not be trying to talk to each other every hour on the hour like we were. I must add before we went on this 3rd trip together she went to go meet one of her female friends two different times later in the evening, around 11 Pm to "talk to her about her bf and the problems they were having". I thought it was very odd hours and that they would go meet out on the street to do it. I returned from last trip feeling ok-but had some strange feelings. When I returned I noticed the "co worker" and her were on the social networking site at the same time and mostly logging off around the same time. I knew right then that they were on the site to speak with each other. I asked her again about this co worker and she was defensive-"he is married with a child!". You see that my status's are that I am engaged. A few days ago I received a message on my Facebook from some guy that said basically "trust me-your girlfriend has some secrets-I know her". I confronted her about this and was obviously shook up over it. She said I should just laugh and delete it if I loved her. In the end we ended up getting into a big fight over it. She told me she wanted to go away for the weekend alone to "think about things". That she was having doubts and didn't know if she wanted to deal with my mistrust and jealousy. She said she didn't know if she could live in the USA with me if this would be the way it is. Well yesterday she "went to bed" and I saw her and this guy on the site-they both were up at 2 am speaking (remember he only has ONE FRIEND on his social site). I had enough, my blood was boiling. I confronted her and she basically said I was crazy and she had no idea what was going on-she was asleep and had her music on. I told her I didn't believe her-that something was going on about this guy and I know that he is just more than a co worker. We had a big blow up and talked about ending the relationship. This morning I noticed the "co worker" disappeared and was soon replaced by a man with a normal name-with photos of himself-a list of 15 friends and photos of his daughter on there. I am positive this man who was added now is the real person she is speaking with-not the "model photo" with the fake name. The man who now recently appeared on her social site has 4 friends in common with her-all work friends..............So here I am now. She has left to go into the Ukraine-alone-with no phone service until Sunday. Our relationship is more than on the rocks. She left-obviously very upset-not interested in speaking with me-but she kept all of her social sites up-still friends with me-still engaged. I am positive that she is having a relationship with this man. I believe she has met him-taken photos for him (she sent me some nude photos out of no where one day)-saying she was thinking of me-then took them. She on two other occasions just said to me-I took this photo for you this morning at work when you were sleeping. I didn't believe her. There is obviously a relationship going on. She is showing all signs of lying and sneaking around. My question is-what do I do now? We spoke about her returning my ring and other things that I had bought for her. I have spent a lot of money visiting her and buying her things over our relationship. She told me she was worried if she returned them that "The Russian post office would steal them". I am numb and have no idea what to do. We also spoke about canceling our Fiance visa-I have no idea what will happen in the next 72 hours. Any advice-if I am paranoid or if I have a real reason to be concerned.