He had impulsive sex with his ex wife & she got pregnant & she left him which meant that he wasnt wanting the breakup in the first place.

To take a 2 week vacation with someone after just meeting seems rather impulsive. There are better ways of getting to know someone you first meet that take a long vacation together.

He's told you he is still involved emotionally with her wether hes nice to you or not. Sex doesnt define an emotional connection especially when he is impulsive anyway

You havent known him that long, he doesnt want to be with you this weekend....huge sign that there is & probably will NEVER be a real connection with him other that what ypu want to create in your own mind.

I would just tell him whrn he calls that since just meeting & spending time with him that any future with him is not the kind of future you want with someone & feel it best to just end contact rather than waste your time.

That would be my analysis & take on the situation