It doesn't seem normal to me that you would go one week living with your ex gf only to move in with a new girl who you barely know the next week after asking me down to hang out. Is this a sign of co dependency or what?
It's good that you are clearly sorting out where your values are different from his. I applaud you for wisely keeping your distance since your values are so different.
I wouldn't read too much into his actions. The "reasons" could be anything from... ."He likes lots of women... .at the same time... " to all sorts of mental labels. Really hard to tell at this point.
If you want a relationship with him... .as he is now. Then I would reach out to him. If you want to learn you lesson and move on, nothing wrong with that either.
Live life for you... let others sort themselves out.
FF