Just Confused, FWB? or Dating?

Me and this Girl met in our first week of college. (in late august) For about of week it was weird, I was throwing vibes and she was throwing them back. One night we were watching a movie in my room with friends and she slept in my bed with me and ever since we've been a thing. After that night it took a month until we actually started having sex. (Its June of the next year now) Im writing because she's been acting weird lately and i don't think she wants me anymore. From August to may, of the following year, we were hooking up and having sex constantly, every day, sometimes 2 or 3 times a day. Mostly because it was easier in school and she would be the one begging me to go to her room. I had football and work but what guy wouldn't want to have sex all day everyday. Soon enough we weren't using condoms and i felt like she really trusted me. we hung out every day and the sex slowed down but i just enjoyed being with her and she said that "I make her Happy". Well the problem is, is that i wanted a relationship and she didn't because she says all relationships turn bad. she just got out of a really bad relationship with her ex (Trust me I've read the text messages) which she dated since 8th grade till college. I keep telling her that i would never treat her like that and she says she knows but she still doesn't want a relationship. Since we've been hooking up she has got with 3 other guys. She only made out with 2 guys from our school but the 3rd guy was her ex and they fucked on winter break. The first question I have is "Do i have a right to be mad at her?" The two guys i accepted because they were in October and we were hooking up then but I hadn't told her that I wanted to be her boyfriend yet. But in November thru now, she is well aware that i want her to be my girlfriend but each time i bring it up she turns me away.(Probably once a month) and we get into the same fight, which ends up in me giving in, because she starts crying, and i don't want to hurt her like her EX did. Knowing that i wanted her, she went home on winter break and fucked her Ex. my house and her house are only like an hour away but she didn't call me to ****, she went to her ex. (She might have been drunk) but thats not an excuse to me. Me knowing this I confronted her about it and we went thru the same cycle except for this time i got drunk and told her that i loved her so that she would stop crying. I do love her regardless of how i told her but i didn't mean to tell her then. She told me that she loved me back and then the next day she told me the same thing. But on the last week of school i threw a party and she flipped out on me because my brother called her a hoe (in a playing matter). but she was drunk and they don't get along very well so she took it to heart and got pissed because i wouldn't "Stand up for her". Blasé, blasé. that night she blasted me on every type of social media and in public, slapped me a lot and tried to kick me in my nuts. (We were all drunk). I didn't hit back. We went through the same cycle again. that same night she texted me like 20 pics of her ******* her ex, and told me that we were done. I ate the bullet again and apologized publicly a billion times and she cried again and it last for 2 days until i went to her room and she told me that she would never forgive me for that. (But shouldn't i be the one upset?) 3 days after school ended (in may) I went to her house and we watched a movie and fucked. than a week later we spent the day together in her town and fucked but ever since then I've been practically begging to see her every week but she says she's "Too Busy" and keeps turning me down. Its been about a month since I've seen her and I my gut is telling me that she's ******* her EX again but my heart is saying "No way". we text every day and every now and then ill get a pic gift but she hasn't shown any interest in seeing me. The last time i was with her she told me that “I don't have to worry about her hooking up with anybody and that she loved me”. but she never said that we were dating, again, so how do i know if she's telling the truth.