Is my brotherrrrr gaaay?

no! Honestly it's absolutely none of your bussiness currently. You shouldn't have snooped his email, and you DEFINATELY shou'dn't tell your parents. I would kill you if you did that and you were my sister (not literally of course.) But when he comes out is his bussiness. And stop trying to find out, if he IS gay, he'll tell you when he's ready.