Checking your ex's social media every day is such a brutal habit to break. I did the same thing for a while, and it just kept the hurt feeling fresh. It's like picking at a scab and wondering why it won't heal. You're definitely not alone in that.
My friend Sarah blocked her ex on everything after six months of checking. She said it was the only way to stop the fake connection @emmaking mentioned. Now she says it feels like a real clean break.
Honestly is it really that serious though? People act like checking someone's social media is some deep psychological problem when it's just boredom. You're not texting them or driving by their house, you're just looking at pictures. I still check my ex's profile sometimes and it doesn't mean anything. Half the stuff on social media is fake anyway so you're not even getting real info. It's more like a dumb habit than some kind of emotional crisis.