<human>: I just started graduate school in Europe and I am from the States. I met this girl a few days into moving into my new dorm. She lives on the same floor. 

First time I met her, I immediately began falling for her. The more we talked, the more I realized she was the girl I've been looking for. A few days later I found out she has a boyfriend back in the States for the last 5 years. As time went on she started coming over and we cuddle and talk about our lives, families, goals, etc. 

Just as I felt like we were clicking, she threw the brother tag on me. But as a month or so went by, she started deflecting when I'd jokingly call her my sister. The cuddling and closeness has gone on for about 2-3 months now and this past weekend I was drunk and she was sober but she came over anyways and we were cuddling to a point where it was not ok.

We were wrapped around each other and fell asleep holding hands. But my biggest problem is that she never wants to hang out. She'll come when she wants to come but never when I ask. 

I understand school is extremely challenging and our professional aspiration is not the easiest to attain. I guess I'm just lost. Does she like me? Does she not? Am I just a filler for her boyfriend? Would love to hear your thoughts. I just know that when I'm with her I forget time. But I don't want to be in a position where I fall this hard for someone who has no intentions of reciprocating.

Can you condense the text into three sentences or less?
<bot>: Went to school, found a girl. Girl has boyfriend. We spend time together but can't tell if this is something more on her side or she is just using me.