21 Male: Friend/Relationship Advice?

21-hetero Male: Currently friends with someone I feel I have real chemistry with. It's been over two years since my last serious relationship and I feel personally ready to at least be open to a new relationship if I feel something is there. I am not really into dating (tinder, bumble, other dating apps) to be honest, so we met mostly through mutual intetests and a little randomness. Of course I value them as a friend and an independent person, but I know I'll regret it later if I don't honestly express how I feel.

We are both studying abroad together (she has already been here a semester), and for awhile since we met, she has been lamenting how she misses her friends from last semester, and one guy in particular, like a lot. I mean, I feel like it's really clear she is crushing on him still, or they had something going on between them (I mean they traveled just the two of them at one point I believe ). Regardless, it's really put a kink in my confidence and I was wondering if anyone has advice to just back off or wait. Just looking for a second opinion, appreciate ya.