How do I ask him if he regretted making out with me?

I'm confused as hell. My coworker, who has been my friend for a long time, has approached me sexually. I like him and even love him, but I think I acted too cold while we were making out.

Now he seems distant... maybe on purpose (he is kinda manipulative at times), maybe bc he regretted doing it. I need clarification, cause I'm going insane. How do I ask him if he regretted it?

How do I ask him if he regretted making out with me?
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