Basically, i know that he talks to a lot of girls but in like friendly way (online). One time i took my friends computer and wrote to him that i want to hook up (from my friends computer meaning that it was my friend asking if he wants to hook up). At first he understood that it was me, but after we (me and my friend) wrote that i left he said that he always wanted to hook up with her and asked her to do it.

Before we hooked up and i know that he doesn't want a relationship. I kinda feel used and don't know what to do.

What does hooking up means to him? is it like nothing for him, even though he hooked up withme the day before

I am 15 and he is 17

thx :)