Dear Qui Talks: I think I cheated!

Dear Qui Talks,

I am on/off with this girl I like a lot. I want to be with her but I do not think we could be with each other. However, I can't leave her alone because I actually like being around her.

The other night I hung out with this girl I have been flirting with for a while. I finally got a chance to hang out, just her and I. We went to dinner, a bar for some drinks, and another bar for more drinks. One thing led to another and I found myself checked into a hotel going to town on this girl. As I replay the night, I start to think about all the thing I said to the other girl. She asked me if I was with Cutie (that's her name for me), I told her no. Which is true but yet I felt like I was lying. Sassy (the other woman) told me how she liked me and I told her the same. I had sex with Sassy then instantly left. I couldn't get Cutie out of my mind. But we are not together and I don't want to be with her right now. What is wrong with me?

Talkers, this is for you to answer!