I was in a similar rut. I'm now in a co-working space. It isn't in any way a startup hub type environment, just a couple of freelancers and small businesses sharing space and resources, but it has made the world of difference to me.

I have people I get to chat to, have lunch with and most importantly of all, I get out of the house and go to work, then come home again at the end of the work day. I rarely switch my computer on at home anymore. It is a lot more healthy.