Damn this here is probably the wisest advice on this thread. Sadly, it doesn’t really apply to your (op's) situation, because she’s one of your only friends. Well that’s kind of stupid too, if you're at university it is literally the EASIEST place to make friends that you will find in your life, you just gotta stop lying to yourself that you can’t make new friends, or that everyone has already settled down with their group of friends. It is super duper unhealthy to constantly do stuff together and for you to pretend you don’t like her and for her to pretend she doesn’t notice.
SO MAKE FIRENDS
Secondly, as I was reading through this whole thread, I realized: you're still in love with here because for some reason, you still think you can be with her. Honestly that’s really stupid. Just imagine: if the guy friend that you're also close friends with all of a sudden had feelings for you, what would you say? "Um no, I’m not into guys" is probably what you would say. Because it doesn’t matter how good looking, nice, or funny he is, because you are FUNDAMENTALLY not into guys. Well guess what. In real life, you are that guy friend and your lesbian friend is you in this analogy. You have got to realize, she is FUNDAMENTALLY not into you. YOU WILL NEVER BE WITH HER. Get that into your head! Once you not only understand that sentence, but actually let it sink in and fully realize the implications, you will be a lot farther in the process of getting over her. This will also hurt. A lot. Probably you will feel more shit than you have in a while. But just like with medicine, if it doesn’t hurt/taste gross, it isn’t working.