Am I Crazy??

So I came back to my old job after being gone for about 10 months and this guy I was friends with was still there. We never really talked before when we worked together he was always very sarcastic and mean but in a funny way. I didn't think anything of it. But just yesterday we started talking and I'm finding myself being really attracted to him and starting to really like him. He's flirting back as well. Am I crazy for liking someone so soon?? I also just got out of a very toxic relationship of almost 2 years a few months ago and already had a rebound that didn't go well.. any advice would be appreciated. We are hanging out tommrow and I'm so nervous haha