How can you tell if a guy is just using you for sex?

You could ask yourself what YOU are getting from him other than sex. If he doesn't seem interested in your life, doesn't gives you support/encourages you, doesn't spend quality time with you (other than sex), doesn't show appreciation for you, or overall doesn't put effort into the relationship then maybe he is just using you. It should be pretty easy to tell. I guess you could straight up ask him, if he looks like a deer in the headlights then he probably is using you. If he isn't using you he shouldn't have a hard explaining why it isn't true.

Well does he talk to you other than about sex?...Does he take you anywhere?..Does he ask how you are doing?.Is he a friend?...Does his actions match his words?...If he only talks to you so it can lead to sex...and then when he cums (lol),he leaves, and you do not hear from him, until he is horny again,than I would say that , that is a pretty good indication that he is using you for sex...You should feel it yourself...the fact that you are questioning it..means that it has crossed your mind, because you must feel to some degree that you are being used...If you felt something good was there, you would not be questioning this...

well...what is this guy doing? how does he act?