I've totally been a victim of bad timing. Beware of rebound guys/girls. Even if two people like each other, and would be good together, if one of them is rebounding after a heartbreak, boy, does that pose a nearly impossible challenge.
But to answer your original question--I agree with the others, don't second guess yourself. You'll only make yourself miserable, and if he didn't have at least some feelings for you, he would never have dated you.