<human>: Can you succinctly summarize the text in 1-3 sentences?

I was totally infatuated with this girl and I thought she was into me too. I asked her out and she said she doesn't have the same feelings for me. I was a little heartbroken but we remained friends and would hang out pretty regularly. 

I started semi dating her roommate. Nothing serious but I would spend a lot of time at their house (including sleeping over). 

Cut to last week and the girl that I was originally interested in asks me if the offer was still on the table. I say yes and we have go on a couple dates. But I dont feel the same way I did when I originally asked her out. I almost feel this resentment towards her. I don't know how she feels (and I dont know why she changed her mind), but im thinking about ending it already. Am I doing it too fast? Should I wait to see if those feelings come back?
<bot>: Asked a girl out, said no. A month later she asks me out, I say yes but I dont have the same feelings as I did when I originally asked her out. Stay or nah?