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Nope he could like you but could be gay, impotent, you didn't spend enough time fooling around to get him hard etc
He still likes you I bet, just making out isn't his trigger anymore if I had to take a guess.
I don't wish to come off all knowing so please take this with a grain of salt, but he might have grown used to making out with you and as such, getting hard now requires a bit more involvement/action.