Why does it have to be so hard?

So I broke up with my SO Monday morning. We'd been having a whole lot of heated arguments due to past hurt that I couldn't get over & me feeling like he'd never change so I packed his shit & moved him out of my place.

But I'm back n forth with the decision now. I miss him so much, I keep thinking maybe if I give him one more chance it could be better. He was my best friend, I feel so lonely without him. I miss playing with our daughter together, I never imagined that for her first Christmas her parents' relationship would be in shambles. I cnt eat, I barely sleep. I've never had a break up hurt so bad 😞