Boyfriend(well ex now) has been cheating on me

Alright so I’ve been with this guy since like August of 2017 and just learned yesterday that he’s been talking to literally a bunch of random ass girls on the down low this whole entire fucking time. I just gave birth to his child in July of 2019. Our daughter is nearly 8 months old. I’ve been living with a complete liar. He was always so nice and loving to me and this whole time he was just manipulating me. I’m heartbroken, numb, and so confused. Was everything a lie? He says that he loves me but he “gets sexually frustrated and this is an addiction.” I caught him sexting girls and I made him give me his phone and read everything. It goes back years with tons of girls. God how was I so blind? What do I do you guys help me😫😞💔 I’ve already booked a ticket for my daughter and I to go live with my grandparents(they practically raised me and are more than happy to have us until we can figure something out). But I don’t want my baby to live without her dad. I grew up with my dad in and out of jail more times than I can count and I know the importance and impact having a father is to a daughter. But how am I supposed to get past this and how do we make that work? I’m sorry for ranting. If you made it this far, thank you for listening.