Depressing

I play it over & over in my head, could i have done or said something 2 make him stay,  he said he hasn't been happy for 3 years of our relationship of 6 years cause he said i didn't make time 4 us 2 go out alone, i have 2 small children and no one 2 really watch them unless my sister takes them 4 the weekend but its been like this since he and i met,  we have gone out, not as much as he wanted 2 or be able to just go away with him spontaneouly, but what i dont get is y would he stay for 6 years when its been like this since day 1and i never pretended when we met that i could, my kids were 1 and 2 when we met. I also put up with his jealousy and everything always having 2 b his way for 6 years or he would get mad at me and if i said something he didnt like he would break up with me and say things 2 hurt my feelings, and not care, it seems like he broke with me every other week,  but when things were good, they were so nice. I miss the man i met and everything he did that made me fall in love with him, now I'm suffering and he's ok with never being with me again or my kids