Am I in the wrong?

I'm with this guy but we aren't dating but we have been with each other everyday for the past week and had sex a few times. We stopped hanging out 2 days ago and he rarely talks to me anymore and I just went out and had a few drinks and was feeling frisky so I ended up sleeping with someone else who I've had a crush on for a long time. Is it bad that I just jumped from having sex with one guy to the next?