I dont think i have to develop any false hope. I analyzed this situation deeply, her and my behavior for the past years and i came to conclusion that my chance is zero. You said about the guy and how you used to have crush on him - its different case. Im sure she never felt anything for me. Maybe those signals were just one of my fantasizes. Basically, she just made a few friendly tiny actions towards me, it doesnt mean anything. I remember the line from this Eternal Sunshine movie - "why am i falling in love with every woman who shows me a bit of attention?".
I have read a few articles about unrequited love and every article says that i should distance myself from her. But its so hard because of social media. I have to be active there to maintain contacts with two of my online-friends. I have hided her from news updates, but still, in the list of online friends i see how she changes her main photos and cant help but check this out and feel miserable afterwards.
When studies will be finished, i will have to decide should i delete her for my personal comfort or not. If i would do that, it would make the possible future meetings with fellow students impossible. I dont know if those meetings even will occur at all. I dont have such meetings with people i knew from school, so its hard to predict. Maybe those meetings will have place, but without me, because i never really was popular guy in my group. There will be time to think about it, but for the moment i dont know what to do.