Invited a girl over to workout that I had fucked recently(Drunk ons). After we were done at the gym she put up some LMR about coming over. Convinced her to coming over for "just a little". Ended up smoking on my bed for a few hours, positive conversation and body language. Escalated kino until she was conformable with me basically half on top of her laying down. Went to the bathroom for a second, and when I cam back she had gotten up. Playfully pushed her back down, and kept talking. Got my face closed to hers and she gave me the classic lip stare, so I went for it. After less than a minute of making out she said she had to go. Saying she needed to shower and it was getting late. These could be honest excuses since she does have early classes, but obviously she would of stayed had I built up enough attraction. Ended up loosing frame and trying to get her to stay(didn't have a good IO, working on it). She alluded us hanging out again before she left which is positive? Was this a fluke that another attempt will fix or how can I salvage this into a fwb?