Most Helpful Guy
I would figure out first whether you are bi or lesbian. There's a big difference. If you are bi then you could still be together. If you're gay then that's the end of your relationship. So figure it out before you tell him otherwise it's just going to be a huge question mark in his head until you do realize who you are. Once you know, I would just tell him and if he's a good guy then he will support you.