Fuckbuddies, opinions??

So last winter, I went out with this guy for like a month until I realised he wasn't really my type and we didn't match at all. So I stopped seeing him, however, after a year we started talking again and decided to be friends.. who at the same time fucked.

He is a really nice guy and still doesn't understand why I stopped talking to him on the first place, overall I am really attracted to him, love the way he kisses me and well.. fucks me. But I'm afraid he starts getting emotional and all, I don't want to hurt him.

What do you guys think? please help.

Btw, we are both 17, go to different schools and are seniors.