Middletown is perfectly safe. There's a couple specific areas in the North End that I wouldn't particularly want to live in, but it's really relegated to like a single block... not a whole neighborhood.

Most of the North End is perfectly safe. The area right around Aresco's/Liberty is a little hairy... 2 blocks away feels like a totally different city.

If you find any potential places to rent, feel free to DM me and I can give you a good idea of what it's like.