Sounds like you're in a prison of your own making my friend.
It's not like everybody has the means to just pick up and go to a different state JUST because they don't like one law. Some of us have other things keeping us where we are. Family, friends, JOBS, etc. I always found the "If you don't like it, move!" statement a bit silly, like we are all 21 with no attachments, or responsibility.
Frankly, even if NH were to enact gun laws similar to Mass, I probably would not move.