<human>: Give me a shortened version of the text

Three weeks ago, I hooked up with this girl who has a boyfriend, let's call her 'Jill'. One of the more attractive girls I have met. It wasn't random, she had been flirting with me for a week or so before, kept asking me to hang out, ect. But afterwards she told me that she had to take some time to think about it, and went on holiday for two weeks. The problem is that I still liked her, but knew she would never choose me, which she didn't of course. Hurt like nothing I've felt before for some reason.

Anyway, this weekend I hooked up with another girl, 'Meg,' who I really like but I'm not very sexually attracted to. She is very fun to be around, pretty, and easy to talk to. And the other girl is still in my mind constantly. 

I don't know what to do. I know that I can't be with Jill, but is it wrong to start something else up if I'm not over her, with respect to Meg?
<bot>: Is starting a relationship ok even if your not %100 over the last one, no matter how a brief it was?