We had a threesome, now what?

Me and this guy I've been dating for a few months had a unplanned threesome , I like him and care for him but I'm not sure why I have no desire to have sex with him anymore. I love being around him I fall asleep in his arms we have a good time together but I have no desire to be his girlfriend , I lately have been through this a lot where I like a guy a lot and love being around him but have no desire to be his girlfriend or wife.
We had a threesome, now what?
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