Is karma real?

My ex has decided to completely cut himself out of me and his unborn sons life to focus on his new relationship. He doesn’t want any part of the baby, and has said “I️ can choose to be the nice guy about this and be there for the baby, but I️ don’t want to be the nice guy. I️ never wanted that baby”

When I️ first got pregnant he didn’t want the child. I️ decided against an abortion and was mentally preparing myself to do it alone, but there have been so many times where he’d hold me, tell me how much he was excited for the baby, and how he actually truly wanted it, how he was happy to become a father. So of course I’m thinking he wants to be there, this is great. Now he has a new gf...and wants no parts. And his excuse, “well...I️ never wanted the baby to begin with soooo yeahhh.”

He tells lies to his girlfriend about me to make me seem like a crazy baby mama, when she hasn’t spoken to me directly. So of course she doesn’t know the full story.

I’m just so hurt. Do you believe in karma? I’m just hoping that God or the forces wouldn’t let someone hurt someone else like that and get away with it.

Edit: thanks you guys for responding. And @abbyh- I️ve always known that to be silly logic, I️ did not keep my baby in hopes that he’d stay. But he played with me, made it seem like he wanted to be there and had a change of heart, only to throw me away in the end after getting my hopes up thinking he “changed”.