<human>: I've been dating my long distance girlfriend for a year now, she lives in Oregon and I live in New York. However recently since she has started school she met this guy in her math class that she really fancies quite a bit and it's really has been making me feel really stressed out. 

At first she didn't want to tell me but she eventually did and she doesn't like the fact that she likes him either but she doesn't know what to do about it and it doesn't help that he sits next to her. She really gets along well with him and I mean really well and I've come to feel as though I am holding her back from something good with him. I always felt that she could use someone a little closer to her but the problem is that I really love her a lot and I just don't like the idea of seeing her with anyone that isn't me. 

I proposed this to her but she insists on staying with me and remaining friends with him. However, I would like to know how to cope with my emotions better so as they don't get in the way and stress her out even more than she already is. I trust her and I know if she wanted anything with him she would cut ties with me first but I can't help but feel stressed out because of this and I want this to stop. 

Thank you in advanced for helping.

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<bot>: Girlfriend of a year has a really bad crush on someone else, decides to stay with me and I want to avoid stressing her out but don't know how.