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It's possible he may have tried forcing things. Has this guy has an extensive dating history, or has it been just a few girls? If he's a similar age to yourself, the pressure of not having found a partner may have got to him, though I'd hope by the time someone was in their mid-30's, they'd have worked out that's not a sustainable approach to a long term relationship.
He could have found somebody else, but I don't think you'll get proper closure until you speak directly to him about it.