I'm 20 and it seems like this issue has been following me ever since I started talking to women. I was probably a 5-6 in high school but since lifting/learning how to dress/take care of myself I can confidently say I'm somewhere between a 7/8, I'm just missing the career aspect/social proof. Onto the issues I'm having-

Whenever I begin talking to a girl (if she's lower smv than me) the dynamic always seems to take the same form. And by that form I mean I guess I put out the vibe that I want to date them. This isn't an "issue" per say, it does not deter them from wanting to fuck me, it simply makes it really hard for me to fuck their friends. Since swallowing the pill about 7 months ago I got into a decent social circle from talking to this uggo (very unattractive, not even BJ material, yup). Her vain attempts at fucking me or gaming me had no effect I wasn't receptive at all. I would flirt or hold her hand but she literally had to beg for my attention. As a note I hold frame pretty well throughout this whole thing, and I never make any advances towards her that make it seem like I want to date her or even fuck her.

This culminated into me telling her, "I don't see us ever being more than friends". That same night she invited me to a party with newfound social circle. Couple drinks in she starts crying and begging me not to flirt with her friends. I say the whole "Yeah don't worry blabla". She keeps bringing this shit up so I get kind of fed up and tell her I'm done talking about this I just wanna have a good night. Eventually I end up in bed with one of the chicks there and she finds out the next morning. Hasn't texted me or anything since, again I'm not upset about losing her I'm just pissed since I was burned out of one of the good circles I've been able to get into since swallowing TRP. I don't know if I'll hang out with them again but I'm not optimistic.

Tl;dr - I have tendencies to make a girl think I want to commit to them, even if I say we're just gonna be friends, when in reality I just want to fuck their hotter friends. This makes me kind of a social outcast and I get burned from social circles because of it (has happened more than once). I don't want to be a manipulative person but I found that gaming a chick is a great way to get social proof with her friends. How should I change my strategy to not burn bridges left and right?