I thought I moved on, but just can't let go and wonder if she likes me... Is it worth trying to reignite the spark?

There's a really cute girl in my class in university and I feel like she likeD me as well (I don't know if she still does). I thought I moved on, but after 4 months I think I have a crush on her again (or maybe I never moved on in the first place). I'd love some advice on whether I should try to reignite a spark or not...

I can be very lenghty about this, but in short: I started developing a crush on her about half a year ago and we started making eye contact and smiling to each other in class. I tried to get to know her. However, I thought she was giving me mixed signals (she was probably just a bit shy as well), so after a month or two of talking with her at school but not asking her out or even for her number, I figured I had missed my chance bc I waited so long and decided I had to move on.

Another month later I thought I finally did so and felt kind of relieved, bc I was just a bit awkward around her at times, not over the top nervous or creepy or something, but I felt I always had to leave a good impression with her and overthought every interaction I had with her. I was just happy I could be more myself without worrying she would think of me as a weirdo and now that I think back, I strongly feel that she started to like the 'true me' more and more (as she gave me the strongest signs back then) but I didn't take my chance.

I've tried getting to meet other girls and during all this time, I've wondered what was missing only to realize I've subconsciously been comparing each one with her and to this day, I've never met a girl as intelligent, cute, funny, emotionally mature and ambitious as her. (We are the 2 biggest nerds in our class).

She's always happy to talk in the rare moment I have alone with her as she never initiates with me if I'm around other people and is always with her friends herself. We still smile and make eye contact every now and then and our last interactions just make me wonder each time whether I should just ask or not.

I just want to know if I should pretend like nothing happened and ask her out or whether I should not and I'll just make it awkward for the two of us as we have to study 2 more years together. I know I waited too long and if she doesn't like me she has all right to, but I jusg want to know how to approach this, bc I think it would feel really random if I randomly asked her to hang out, as we've never done so. Should I slowly try showing more interest and take my chances if I can, tell her the truth about me liking her again...