I started my Erasmus experience in October 2018. I met 2 guys and a girl of my same country but from different cities (they are all from the same city expect from me that I live far away from them) and we became friends. Especially with the girl, we just clicked, you know when you meet someone that thinks like you and you don't even have to finish a sentence because they are thinking the same? It was our case. Soon enough I got intimate with her. The problem was the she had a boyfriend. She cheated on him for 2 months with me, she never told him anything. After a while she began to tell me that she loved me and wondering how she would have done without me when the Erasmus would have been over. During the 2 months I always told her that I couldn't see her as a possible girlfriend because she never told her boyfriend the truth and I could never trust her in a relationship, especially in a long distance one. During the winter break we both came home for Christmas and although what she said to me she had no problem sleeping with him and posting stories on Instagram with him. It was at this moment that I realized that I was in love with her and I was suffering a lot. After the winter break she told me that she chose to stay with his boyfriend and this crushed me, I could barely go to the same class with her but after a week I accepted it and managed to be friendly with her. But after a week or two we became intimate again. I told her that I accepted the fact that we couldn't be together because we want different things anyway, she wants to get married and have children in 2 years, she is 24 and I'm 22 and thinking about these things is just too early for me. I told her that I would be happy if she found someone to start a family with but that I couldn't be her friend if she did that with her current boyfriend. Yesterday she met him (she has a long distance relationship with him) and today she told me that she didn't leave him so I basically said goodbye to her and to never text me again, the reason is that I'm scared of what she could do to me, a "friend", after what I saw her doing to her boyfriend for months, I told her that I don't have friends that I don't trust and of course there are still feelings involved because I'm not over her yet. Another thing is that her bf started to suspect about me and I just don't want to encourage this enormous lie, I tend to be as honest as possible in my life and I think that it's not possible to have a healthy friendship with her anymore. 
So am I the asshole for cutting her off? I didn't block her or whatever, I just told her to never text or call me in any case, even if someday she had to leave her bf because she already made a choice and I told her months ago that I would have done this.
Thoughts?
