My baby daddy left me....

My baby daddy is my high school sweet heart. We have a kid together from a teen pregnancy. He got me pregnant at 14 and I had our son at 15. We are both 19 now... He broke up with me yesterday and is moving out. He told me he's been struggling with his seriality and feels bicurious and wants to be able to explore that more.... He told me he's still young and wants to figure out who he is..... I became a single mother just like that. He messaged me asking if I wanted to discuss what we want for custody. He's wanting split but I haven't even messaged him back. I've been ignoring him. He took my virginity... I thought we were gonna get married and now I'm a single mom if a 4 year old.