A little background: I am better at picking up women when I'm not trying to pick up women. I am just more relaxed and confident when it is not on my mind. That said, I can become "blind" to IOIs that I receive from women and often fail to capitalize.

What happened: I'm at a brewhouse with a few friends, trying to unwind after a rather hard day. Picking up women is the last thing on my mind and I'm just trying to have a good time with some buddies. As the buddies I originally came with have to leave another friend and his girlfriend arrive along with a friend of his girlfriend, so I decide to stick around. I know this girl from years ago, and though we were never more than friends of friends she has popped into my life a few times over the years. She comes from a wealthy and prominent family in my area and is used to being treated well because of it. She is an HB8 or 9, I'm not sure exactly what to call her but she clearly values herself highly and has high value friends.

So we all get to talking and I quickly become the "leader" of the conversation. This tends to happen when I just don't give a fuck about the situation and decide I just want to entertain myself. I don't exactly know how it happens, but it did in this instance. Anyway, I'm mostly talking to this girl while my buddy and his gf occasionally add something to the conversation. It isn't that I'm ignoring my buddy and his girl, I'm just clearly focused on the HB with strong eye contact and my body turned towards her. I wasn't intending for it to be that way, but it turns out we had a lot in common: my father is a novelist, her grandfather is a novelist. She lives in Europe most of the year, I lived there for a while a few years ago, etc.

At some point she mentions she has a boyfriend who lives in England, and this doesn't phase me because I wasn't trying to pick her up in the first place. I remember making a mental note, "Oh she has a boyfriend, guess I won't hit on her." I'm torn on the idea of hitting on women with significant others as one part of me finds it extremely crass and another part of me wants to get laid (my dick). Anyway, we continue talking and building rapport with one another. As the night is winding down she starts complaining that going home will be "scary" because her parents' house will be empty since they're on vacation. I ignore this and keep talking. We leave and my buddy and his gf get into their car. My car is right next to HB's car and as we're walking to our cars together she brings up how she is scared to go home to the empty house three times within about a minute. I didn't offer to "keep her company" because she said she had a boyfriend. Did I fuck up?