Single mom

Aleiyah

So the last few days have been rough for me. I am wondering how you single moms do it all im20 years old and I am having my son in 4 weeks the father cheated on me and choose the other girl kver me and his son. But he wants me to let him see his son, he doesn’t come to appointments or anything and has the new girl telling me basically what to do and that me taking him away from his father isn’t right. The new girl also said that she was gonna fight me when the baby comes out and she is telling me nkt to flirt with her man. I never even knew about her until a couple monthsago and he lied to her saying I wasn’t dating him which I was for 3 years. People are telling me to put him on child support what do you guys think I should do? And he also said loved me and stuff an