What should I do ! 😢

So Me n my bf been together for 2 years now and we have one baby she’s a year old now, and I just found out I’m 8 weeks pregnant. Me n my bf are no longer together right now because all he does is play ps4 n we do argue a lot n also he doesn’t spend time with his daughter. So I’m scared because I don’t want to be stuck with two kids and I dont know what to do I’m only 21yrs old rn and I’m pregnant with his other child and I just don’t want to struggle with two kids by myself ..