Best friend crushes

Basically, I really like this guy and have done for a while but I’ve kept it to myself however recently he was getting close with my best friend (in a friend way) and she really likes him now and told me that she likes him. I didn’t have the guts to tell her that I like him as well. Later I asked him if he liked her and he said no he likes me. I don’t know what to do? Help???