πŸ˜’ Just want to be happy

I'm a mom of 3 right now πŸ’œπŸ’œπŸ’™ new baby πŸ’œ will be here Nov 19. My kids father an i been seprated for 7 months now, he's in a new relationship. He havent bought our new daughter anything at all everything I've got for her i got it or my family helped get it. I'm currently not working at the moment due to being pregnant and I've always stayed home, with our kids into he decided to walk out on us. I can go days without asking myself what did i do to let this happen to me then I'm like he showed me his real colors. I really do miss having my family but now i know I'm on my own when comes to kids and doing stuff. I just wonder how can a man go from being so happy and so inlove and wanting his family to walking out and getting with someone else