How to get over it?

I need advice on how to get over a relationship with my one year old son's dad and my ex of 4 years.
I need advice on how to stop creeping on his social media every day of the hour.
I'm driving myself insane and i just want to get over it.. I'm doing myself no good being miserable wondering what he's doing and with who. But it's hard.
How to get over it?
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