If I temporarily move to another state can I keep my car registered in my home state?

I live and work in Massachusetts. I'm getting divorced, and we just sold our home. I moved in with my parents until I can find another place to live. One of my friends told me when his girlfriend's lease is up they want to move in together, and I could have his apartment 5 miles away in New Hampshire for the last 5 months of his lease so he could move out. My question is, Can i still use my parents Massachusetts address, or do I have to re-register everything again with the registry as I plan on moving back to ma when the lease is up? It gets expensive re registering everything, and I'm hoping to avoid it especially since I will be still staying down at my parents 3 or 4 days a week.