Bisexual at 23

Hey everyone!

So I got out of a 4 year relationship and had no intentions of “catching feelings” for anyone, I wanted to be completely single for a while just to get on my own feet mentally yk ? Well a few months ago I met this girl and idk what it is but I am so attracted to her. The way she carries herself, how sweet and caring she is, and she’s just an awesome individual. But idk if I should tell her or not... I’m so nervous about rejection and possibly losing a friend as well. Any suggestions ? Thanks y’all