My boyfriend (20) and I (20) have been together for a year and a half and things have been going well. He's already bought up the idea of marriage and moving in together, suggesting that we're going to spend the rest of our lives together.
He's my first ever boyfriend and therefore the first and only person I've slept with. He, on the other hand, has slept with multiple girls. This doesn't bother me, but it feels as if I'm missing out. I've bought this up to him and I don't think he fully understands, but he says that if I really want to, I can hook up with anyone with his permission.
I've suggested threesomes but he's highly against the idea as he says he's too protective and would hate to physically see me with anyone else.
At the moment, I doubt I would sleep with anyone else, but if in the future I feel trapped or lonely (he's in the army) I feel like if I were to ask him about it again, he would understandably be upset and worried.
Contrary to my bf, sex isn't a big thing and I've told him that he can do the same, but he says I'm the only only other person he's ever going to sleep with.
Should I do it at the risk of him becoming upset? Am I a terrible girl friend? Should I completely drop the idea?