Am i doing correct thing?

Hey fellas i recently got into a college and found it so overwhelming as I am a introvert.But one day I met as girl who sort of adopted me and now from last 15-20 days I am being with her in college most of the time talking and enjoying my time.But like i am usually strict about relationship and have a rule to know a person completely before having relationship and due to this i never had a gf ig.

But with her now for first time in my life i am feeling love ,i think about all of her conversation,worry about her and what not and i am saying this as in these 15 -20 days ig i mostly know her and i love her personality,sense of humour and everything.So from these recent days I was thinking to wait for 5-10 days more and confess everything .But yesterday on one topic I get to know that she has a bf in other college ,I was heartbroken at that time for no reason I was crying from inside but i handled that moment really well and made sure that she didn't feel I am feeling bad. But like now I am feeling so bad idk and I am thinking to drift apart from her slowly as it'll be better for both of us I can't be with her being as a friend and see how perfect she is and i don't want her to feel bad about me if I confess feelings to her.

So am i doing the correct thing? Or what should I do at this moment.

Tldr: loved a girl but she has a bf so thinking to move away from her life as i can't be like this with her.