Next time, tell such a guy you're not interested in those games and stick by it. If one warning isn't enough (they keep playing that game) tell them you won't play with them. And find another guy. Don't waste time and energy on guys playing games you don't like.
It may also be that the guy is insecure (he can't tell if you're interested in him and gets afraid) or is afraid of commitment to you. Same solution: talk about it with him. Tell what you want. If you can't get that from him, let go.
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