I agree with Mark and Anita… and no matter whether he is your first your your 10th, no matter how much experience you have, if you only want to be with the person you are in love with in that way, then no amount of experience is going to make you want a threesome.

I can see how you’d feel attached to him and the thought of letting go of him might make you feel uneasy, but I really think you’d be better off finding someone with values similar to your own. This guy will not be able to treat you in the way you deserve and, given what he’s said to you, it’s not likely that he will ever change.