Lost and alone

I’m 26 with two kids. I moved to GA with my then boyfriend November 2015. Our daughter had been stayin with his parents down in GA since that may. We had our 2nd child july 2017 and things have been completely a mess since. He officially moved out of his parents a week ago leaving me and his kids at their house. I don’t have any friends and pretty much no family here other than his. I’m so down because I left everything in MN to move down here so we could start over as a family. I currently feel like packing up the kids and moving back to MN i’m so depressed here all I got is my kids and the jobs pay so little here I dnt know how i’m going to make it on my own and move out. I don’t want to feel like i’m being spiteful but doesn’t my happiness matter? Is that selfish to feel like I need to leave to be happy