babes by the date of this you should of had your son. i wonder ho things are going???
you should move out or have your ex move out for a man to dump you whilst pregnant is an extremly sad thing to do and would you really wanna get back with someone that left you during a very emotional and vulnerable time.
its good that he says he will be there for you and your son but you need 2 b strong and be there for yourself as in the end he can up and leave you and your son so you need to start looking after you and your son and not depend on his love or what he says he will do for you.
you could give ur baby ur name if it would make you feel more comfortable thats not a biggie...but in the likely hood that you and ur ex were 2 get married then your son would be the odd one out. you could give him a double barrle last name like jone-smith for example. honestly i dont think living together would work beacuse when it comes to you to moving on its gonna be harder and may cloud u 2 being able to be good parents. good luck n i hope all goes well