I don't know what to do?

i live in canberra with my boyfriend and 2 kids and im 18 weeks pregnant. i am originally from nsw. i don't have any family in canberra only 1 friend in queanbeyan and my boyfriends family in south canberra but we don't see them much.rent down here is really expensive we already pay $350 rent but we pay it fortnightly for a 2 bedroom unit. we are expecting to pay up to $450 a week when we move. my boyfriend is a removalist and he loves his job but to me it feels like its not enough to pay our bills. i really want to move back home with my family so my mum can help me with kids and i get out more, i don't leave the house much because i feel like theres not much to do and we dont really have the money to go anywhere. my boyfriend has to work pretty much every day except sundays so that he gets a good enough pay. i cant talk to my boyfriend about how i feel because he doesn't want to move back to nsw, im just thinking of telling him im moving and do it and my mum will pick me and the kids up and ill stay with her till i get a new house???