I'm so confused, he loves me but doesn't want to be in a relationship?

My ex broke it off because he wasn't ready for a relationship. We decided to be fuck buddies. Id still text him and check on him and I jokingly said, "... cause you don't love me anymore." He said thats not the case. We haven't slept together in 4 months. I asked what we were and he just said right now nothing but fuck buddies and he's been weird since.
I'm so confused, he loves me but doesn't want to be in a relationship?
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