Still crying about it 😭

2 months ago my ex and I stopped having sex. I broke up with him 6 months ago. I cry almost everyday and I’m sad. I feel so pathetic for still crying but i cant help it. I really loved him but i had to leave because he wouldn’t stop cheating, and he would get mean whenever he was talking to other women. We have two babies together so this is another reason why I’m so sad about it and he’s moved on already and the thought pf him making someone else happy hurts me. Im trying to get over it. Is it normal to still be so sad after a breakup? Its been months 😩😭