Getting laid as a pretty girl is easy. Getting commitment is hard. We'll say I'm a HB8.5. Most HG5-8s and some HG9-10s hit on me without prompting. With pua tactics, I can get almost any HG; but only for sex.

One specific HG8 is a bit shy. After weeks of flirting, we finally made out. He didn't push for sex, and after a few hours of cuddling, I left.

HG8 never asked me on a date or for my #, but when I see him around, he lights up, tries to chat, and attempts weak kino. When he sees me talking to another guy, he'll get jealous and try to interrupt, often finding excuses to remove his shirt first.

I tried to escalate our relationship, but was beaten out by a HB6, who pursued him aggressively and slept with him before he and I made out.

The HB6 gets jealous and tries to physically pull him away when she sees us talking. He ignores her when I'm around, but they bang and flirt when I'm gone. She recently fucked his friend but HG8 doesn't know.

One risky way (edit: that I do not want to try) to get exclusivity, would be to start sleeping with him, and then ask him to choose between us, but that would be manipulative and I don't want sex outside of a relationship. Would guys drop sure sex for possible sex with a hotter girl?

I haven't done anything aggressive so far, but it's obvious to everyone that I like him. I feel like a girl 'breaking gender roles' and asking a guy out makes her seem lower value. (I've asked guys out on dates before and had them respond "do guys never ask YOU out?")

TL;DR Are there any subtle tactics for a girl to escalate romantically and destroy replace a guy's fuckbuddy? If not, what aggressive tactics should I try?