S*x with the ex! Was that a mistake?

from NoraDevot

I'm still in good contact with my ex-boyfriend Tim. We've been separated for a while, we still write and get on well. He asks if I'd like to go for a coffee with him again. Why not, I think, and two days later we're sitting in a café. He looks really good! We talk and can't take our eyes off each other. "You look beautiful! I really enjoyed my time with you back then!" I look away sheepishly: "I also like to think back to it..." I know what he's alluding to, our sex back then was simply indescribably hot! When I think about it now, I immediately feel like him again! He seems to feel the same way... he literally undresses me with his looks! "Would you like to come to my place?" Before I think about it, the words are already out of my mouth. He just grins and together we walk to my flat share. As soon as we arrive, we fall all over each other. Wow, that sex was really as hot as I remembered! He still knows what I like, even though it was really cool, I shouldn't have gotten involved! Since then he's been calling all the time, wanting to see me. We said it was a one-off thing! What do I do now?