Hindus/In love with a womanizer
If a woman is in love with a man who has no feelings for her, but lied to her that he loves her only because he thought he had a chance to score her, but she never gave into him, and now he has revealed he never had feelings for her.
This woman is still in love with him and can't think of anything else.
Will God punish him
In my view - no, because there is no evidence of existence of any God (Remember that you are placing this question before an atheist hindu). The woman should move ahead and not waste her affection on one who is clearly unworthy of it. There is disappointment on this way if not anything worse. With best regards,