Ex-boyfriend

Hello, i started dating a this guy last year. Things moved quickly and I allowed him to move in after 6 months of dating. I've bern single for a long time and hadnt lived with anyone in 18 years. Well, as you may have guessed things ended and he moved out. Well, after several months I get a missed call. I didnt recognize the number so I wasnt in a big hurry to call the number back. So when I did it turned out to be my Ex. We have gone out several times now and some feelings have come back or gotten stronger. We both were seeing someone else. I stopped seeing the guy I was seeing not to be with the Ex but because he was an alcoholic. I tried to keep my distance from my Ex but he would call/txt me. As time went on I would hear I cant talk now she is here. Or Im not sure I can trust you to know were I live you may come by and she is here. He did invite me over to his house so Im thinking did things end with them. There is female items still in the house. So I asked and can only get she is just a friend. We havent had sex. We are just friends. But I cant know who she is. He keeps asking me if I have posting anything on fb about us, which I hadnt. He says im being honest with you and you knew. I guess my problem is.....should I be mad? Is my gut miss leading me and there isnt nothing going on with this women?