Most Helpful Guy
He sounds like an immature idiot who doesn't want responsibility and doesn't have much of a conscience because he rarely has to deal with consequences. If you haven't already had a paternity test done to prove that he is the father then I would seek legal advice because if this guy thinks that he can escape all of his responsibilities then he is wrong and should be reminded of that. If he has made a child with you then he is partly responsible for paying for that child.
In general though, you should not get further involved in his new relationship. If his new girlfriend is naive enough to fall for his bullshit then there's nothing more you can do for her.
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