Theres nothing you can do. If hes gay and you are a girl, youre out of luck. Why would you want to be with a gay guy anyway? I dated a guy years ago who was bisexual and his boyfriend ended up getting HIV and I thought I was going to have it, I dont, thank God, but thats a huge risk you are taking, the HIV rate among gay men is like 1 in 3 and you cant trust condoms. Dont waste your time with him!