I'm 20 and in university. The first day of uni I met a girl with whom I instantly hit it off. I came from a small and isolated community, and she was the first girl that I ever went on a date with, and later on, kissed with. After being together for almost four months however, she still doesn't want to consider us an item. Up until recently, I (the inexperienced kisser between us!) was the only one who initiated our kisses. Her explanation is that she is still "healing" from her last relationship she had in high school with a guy she was very serious with, and wants to take things slowly with me. I am extremely passionate for her, and told her that I could never imagine a girl better than her and that I'd be patient for her.

I have the feeling, though, that this is not the best course of action for me. She wants to take things slowly because of another guy from almost a year ago! I am scared that I will wait for her to no avail, and that she won't ever be as passionate for me as I am for her. We've had this conversation, and she always assures me of the contrary, but this isn't reflected in her behavior. We still aren't a couple. She still has pictures of her ex on her social media profiles. There is no end to the wait in sight.

I'm having a really hard time studying. I've already stopped regularly practicing the musical instrument I was playing because I can't get this agony out of my head. She is my first girl in so many ways and the excitement and emotions are preventing me from assessing the situation in a level headed way. What's your advice?

P.s. I have done my time in gyms and it shows. I chose her from all the other girls on campus because she is seems like a really good and decent girl - a rarity [these days] at my uni.

Edit: changed the wording in my p.s. for the sake of precision