<human>: Can you summarize the given text in a few sentences?

My boyfriend (22, M) and I (23, F) have been together for 1.5 years. Recently, he approached me about missing the chase and act of sleeping with new women. I can see where he's coming from, since we are young. He told me that he loves me and that he feels like an ass because the whole thing seems absurd even to him. 

We had talked previously about threesomes, but I had some misgivings and we never went forward with it. He's quite a bit more sexually experienced than I am; I have never really had casual sex and the idea doesn't appeal to me. I just have a hard time being physically attracted to people that I don't love.

Anyway, I feel as if I may be responding in an incredibly naive fashion, but I want to be with him, so we decided after some discussion that we would try threesomes in order to satisfy his desires while maintaining the relationship. A couple of days ago, we met this girl for dinner and talked with her for a few hours. We then proceeded to mess around, without things moving to intercourse. All in all, it went pretty well and I enjoyed myself, despite how awkward it was to begin with. He had an incredibly good time.

I guess the main problem I'm having is that I'd like to know from him that this relationship really has a chance. That when he moves forward in life, I can move forward with him. I'd rather not have to attempt what may be emotionally challenging for me (watching him have sex with other women), if he already knows he can't see being with me long-term. He did say that he wishes we could have met ten years later than we did.

Also, we have a pretty good sex life otherwise; is it reasonable of me to want to limit our third person encounters to once a month or so?

Over all, am I being ridiculous? I think I just need some perspective. How do I approach this all in the sanest way possible?
<bot>: Boyfriend feels need to have sex with many women. We've decided to try threesomes. Is it crazy of me to want to set frequency limitations and get real answers about future of relationship?