I got left

I’ve been with the father of my kid since I was 16 now 19 2022 recently before my kid was born in 2024 he went to jail we were okay but I found out he’s been talking to another girl a day ago I confronted him about it and he basically took her side and gave her his social media accounts the girl told me she will do anything to keep him and be with him she has a kid too now I’m heartbroken just because of the principle of him crossing her and her kid over his own family and feel humiliated by this girl and never want to hear about him ever again then again we have a kid together I don’t know what to do but he’s already blocked