Can’t be in a relationship with me but will stay single as long as I am?

I confessed to my guy friend, and he said that there was only one reason why we can’t be together and that didn’t have to do with me, hut he’s also said he won’t get a girlfriend if it hurts me, and won’t get one until he knows I’ve moved on and will be okay (have a boyfriend I guess). He simplified it and basically said that if I stayed with him, we’d be friends, but if I leave we both get married. I really like him, but I don’t know what to and it sounds like me and him will never happen, for a reason he can’t tell me. What should I do? What does this mean?

Can’t be in a relationship with me but will stay single as long as I am?
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