<human>: I (20f) have been considering "pitching" the idea of an open relationship to my current FWB (20m). We have been having regular, casual sex for about a year and a half now. It's not all about the sex, though. We've recently started spending the night at each other's places, we stay up late joking and talking, we know a lot about each other and we're very compatible personality-wise. We are both very open and comfortable with each other, and our sexual compatibility is great.

We've both had sex with other people, and we know about it. Somehow no matter who else comes and goes, we always end up back with each other. Which is why I think an open relationship would work between us.

I really just want one with him because I'm willing to establish that him and his needs would come before other people, and I'd like the security of knowing he'd think the same of me. I think it'd open us up to hanging out more besides when sex is involved, we could go out on dates and do "coupley" things. However, I'd still be able to go out with my friends and not feel guilty, and I'd be fine with him sleeping with other people especially since sometimes my work schedule/personal life/schoolwork leaves me with no time/energy for sex. I personally wouldn't want to make it "Facebook official", but I wouldn't mind calling him my boyfriend and having him call me his girlfriend. I'd leave that up to him though.

I just wonder how this all sounds from a guy's perspective? On one hand, I think it'd be appealing because it's all the benefits (emotional/physical) of a girlfriend, but still with the freedom to roam when he pleases. On the other hand, I don't have a Y chromosome and I don't know if this would make me sound insecure or possessive or scare him off.

All opinions/advice/personal experience would be helpful!

Can you give me a shortened version of the text?
<bot>: 20f in a really great FWB with 20m, wants to pitch the idea of taking it to an open relationship but not sure how it would come across to the guy.