DID I MAKE A MISTAKE SLEEPING WITH MY FRIEND?

I am in the middle of a divorce due to physical violence. I have a friend who I've been in a strictly platonic friendship for over four years. We've never done anything together until just three days ago. I've always known about his on and off girlfriend. Regardless of their situation, I've never slept with him. Well obviously I've gotten weak and now we've slept together. He made love to me like never before over and over and over. I even think he tried to get me pregnant. On the flip side of it, he's starting to act weird with the phone calls now. He claims that he wants to take things slow as I do as well because I know I can't take a full blown relationship right now. However, now that we've slept together, I just look at him differently. I'm always thinking about him and now that he's acting slightly weird, I feel like I made a grave mistake, but I just can't let it go. He kept asking me "What now?" and when I told him I don't think I'm ready, it's like I feel like he's playing games with me. Has anyone ever experienced this? Should I believe him about him wanting us to get together? It was almost as if he was saying if we can't be together, then I may as well stay with her. Help!