Advice needed…

So I recently hooked up with a coworker. We were really good friends before we decided to do it. We weren’t looking for much on either side (relationship wise). But after doing it, it just seems as if the vibe changed. Maybe it was my fault but I had asked him if it was going to be a one time thing or are we going to continue? He replied, “I’m not going to lie, I didn’t think that far ahead.” In my head that means, that he didn’t enjoy what had transpired between us which led me to tell him that I’d leave him be. Though after sex, he did tell me he enjoyed it and that “I put it on him” which idk if he was being funny or not lol. I don’t know I’m probably overthinking this situation.

Now the advice needed would be, how would I go about us forgetting what happened and being really good friends again? & How can I not feel insecure about what happened between us? I know everybody has their own dislikes and likes when it comes to sex & that’s okay, but for some reason it’s kind of bothering me lol. I am personally a person that sex only gets better each time and sex the first time is not the greatest because we don’t know each other’s bodies that well. I like him and respect him a lot. I don’t know, but the whole thing just makes me feel a bit insecure about myself… 🙃