3some,

Congrats for being so openminded. I would say that your so open that there is nothing on mind to judge what is right and what is worng.

I read similar question on other forum and hope that u did not post it over there too. So I am copying one of the reply on that post

Well, first thing, this 'bf' of you is no bf of you: he's just a shameless jerk who is using you can't you see that? A man who thinks of a threesome can never be loyal in a relationship.

Secondly, you need to do now is to ask him to have a threesome but this time 2 boys and u...now just see his reaction if he says no or smthng like r u mad/crazy or smthng dump him
if he says ok thn u need to decide whether u wanna continue with ths guy as he might b relly addicted to all ths stuff wch will create problems for u in future