I want to know if I'd be an asshole for this and ruin a professional relationship I have.

I'm falling in love with my professor.  I feel like if I pursue these feelings, I could potentially risk their career.  For nearly 2 years, I had have the strongest feelings for them.  I've never been so hung up on a person like this before.  We actively talk and we know each other very well.  I think they know that I have feelings for them, and I think they at least have some feelings for me, but they can't act upon them because they need to remain professional.  I respect that entirely.  

I just don't know what to do.  I want to with them or at least let them know how I feel, but I don't want to jeopardize our friendship and their career they worked so hard for.  Also, my professor is not married and is not in a relationship with anyone at the moment.  

I tried to move on and see other people in the past, but with other people, that emotional connection is not there, and my feelings for professor continue to persist.  

Would I be an asshole if I pursue? 