spanish (mexican) translator please!

Its hard for my potential boyfriend and I to talk about cirtain things because his english is ok with some subjects he deals with at work, but not so good in other subjects. my yers in class and text book are of no help!

we had sex but i dont want to anymore. i told him that via text and he said ok, but in case he tries for it again, what can i say (or write in my case cuz my accent is so heavy) i cant imagine him liking me so much hed still wanna just see each other without sex.

so how do you say "i like you, but i dont want sex" or "i want to wait before we do it again" something like that. and my spanish is good enough so ill know if some smartie tells me to say "i take it in the ass" or "i love sex with horse" lol