I read your last post, but I don't see why asking her out is problematic. At least, no more problematic than any other nervous person asking a person out.
Given that you've got many of the same interests, just ask her too see a movie or band that she'd like. Or see if she's up for a protest rally with you (assuming that you are also a leftie)
Nothing is going to happen unless you get the balls to initiate something. Yes, it's possible she will say "no". But isn't that better than you ending Uni without having tried and wondering "what if?" for years to come?
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.