My crush has a girlfriend, but I still think he's showing interest. What do I do?
As long as he has a girlfriend, you should avoid showing him signs that you want him. It is good to respects other people's relationship and avoid being around him at all cost.
Don't get in the middle. He is a crush not your soul mate. Don't think your crushes are your soul mates.
Davescat and awesome253 are correct. Take their advice
Just be his friend for now that's all you really can be. Good luck!
Boy has a gf and it is not you so that is why it is a crush. Get over him and go find your own bf.