Intense FWB situation? Help?

Me and my FWB are 2 years apart. I’m 18, hes 20. We met through mutual friends and hung out a few times, late July — we hung out and hooked up. I thought this was going to be a one time situation but it turned into something consistent. After we hooked up he start coming around everyday, and we’ve been seeing each other consistently. I saw him for the first time in 3 weeks yesterday (that’s the longest we’ve gone without seeing each other). He always tells me he misses me, always texts firsts, he gets possessive and he doesn’t like hearing or seeing me with other guys — he feels some type of way.

He says I’m “his”. We’ve never talked about a relationship together, but he told me he doesn’t want me to get into one with anybody else. Truth is, he drives me crazy and we have an intense lust filled relationship. What should I do? Should I drop him? Should I continue dealing with him?