Miserable mum, wanting to move back home (interstate)!? What to do and consider?

I moved interstate about 3 years ago, left my home town behind for my OHs work commitments. We are a blended family, he has 2 children from previous relationship and I have 1 also and we have 2 together.
I moved to another state with absolutely no support or family network...my entire life and family are back home. We have a routine for his children etc and I as their step mum are quite involved in their lives...
We've been talking about moving back and in my head I know I definately want to move sooner than expected (our lease runs out in feb this year) whereas my OH wants to renew ect and move later down the track (a couple years)...I have no problem with getting up and going with my kids, I'm set up back home and have the family and security support network there also, but I know my OH won't come but still allow me to go, resulting in a long distance relationship (which will b too hard on us and our kids)! I am miserable deep down inside, I miss my family and friends! I do regular visits as much as I can but it is costly...I am very family orientated and I feel my children need to be surrounded and bought up the way I did...I feel they're missing out. We really have no one other than the people within our four walls! There is just so much to consider; our kids, his children, our relationship...I get more and more homesick each year that passes...
Do I take the leap? Keep discussing it further? Keep waiting on him for a couple more years? ...Emotionally and mentally miserable and drained...