What do you do to kill your feelings?

I'm catching feelings for someone I shouldn't be. He's not in a relationship or anything like that I just know we aren't compatible and it would ruin our friendship if we broke up...butttttttt that doesn't stop my heart from beating at hyper speed when he sits close enough that we're touching. I don't want to stop hanging out with him because I value our friendship (which is a major reason why I don't want a relationship with him), but I have to find a way to kill these feelings before they come out in some unforeseen way. Once I was drunk and almost told him how I felt! Nothing like that can happen again.