I need help 😥

I don’t know if I’m overthinking anything or going about things the wrong way. But anywho me and my bf been together for years now. He has a daughter age 3 and I have three kids and one otw by him. The kids did not want much for Xmas but what they all wanted was expensive which is fine they get all year round so no problem. We agreed on getting all the kids what they wanted and buy clothes and shoes after. So he started on his kid first and got hers out the way. So on yesterday which was the 2nd basically first of the month bills are due. He know we have bills due. He insist on getting my kids they gift for Xmas today but I told him no let’s pay bills instead but he goes behind my back and buy 500 dollars worth of clothes and shoes just for his kid. But me as the women I go out and get all the kids things together and not just one. So we broke up because I told him his priorities is not in line know we had bills and he have to pay child support today as well now me and my kids maybe without water and lights next week and they couldn’t go to school today cause he couldn’t afford to pay the car insurances. I’m at my breaking point to where I can’t take it nomore. I don’t want to feel like I’m wrong or jealous so what he say I just 😭😢😢😢😭😭