I hooked up with a girl while her bf was sleeping in the next room. She knows I have a gf and and she's subtly qualifying herself to me that she would be a good gf to me. She really likes me and hates that she just moved in with the guy. I want make her my gf. Does a solution exist?

Yes, I know TRP would advice against finding such a solution to this case in the first place. She's certainly an AWALT, I know. Feel free to post any thoughts, but I'm really interested in how I can make her my new LTR. Thanks.