I caught feelings for my friend with benefits, will he want more?

So I've been seeing this guy for just over a month now, he told me from the start he wanted someone to 'have fun' with and that's it. I was recently out of a bad relationship and didn't want anything serious but was cautious as I've never done casual before. However we started seeing each other anyways. The problem is he wants boyfriend privileges without the relationship. He has gotten jealous, made me delete guys off facebook, wants to know who I am with when I go out, etc. He also spends the night frequently and sometimes doesn't even want sex, just wants to cuddle all night and morning. These mixed signals have caused me to catch feelings and I told him that he's confusing me and I've got feelings and he rejected me. He said he can't handle a relationship right now, but that what we are doing would probably become a relationship. I told him I can't do it anymore, that I don't want to be fuckzoned, but eventually we were back in bed again. My question is why do men say they don't want a relationship but act like they are in one anyways? Is it an excuse to manipulate the girl into having sex or are you's too scared to admit feelings? I'm so confused.
I caught feelings for my friend with benefits, will he want more?
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