Unless, all you want is sex & no emotional relationship with him. Ever.
And what happens if while you're making out or whatever one of you starts to develop feelings for the other one?
Fuck buddies, friends with benefits, or whatever you want to call them can be fun. But at the same time, they are not a real relationship.
We can't answer this for you, it's for you to decide on your own. Do what ever is in your best interest, not ours.