I need your opinion

So there's this boy and he's my crush well we have been talking and some of it is sexual but for the most part it's not well he told me not to tell anyone that we were taking like that and I said I won't. Now my friend won't stop bugging me trying to get me to tell her what we were talking about. Well I told my crush that and he read the message and now he won't text me back and idk if he's mad at me or what but it makes me feel like he used me for talking like that and then left and idk what to do? Please give me advice