I agree with the others. Make the move.
It can be very expensive to live on the West Coast. Is your expected income enough to live as well there as you do where you live now?
For example I have a brother who lives in the Los Angeles area. He as a two bedroom apartment that he pays $1600 a month for + utilities. That same apartment here in Albuquerque would be $800 a month. He makes more in the LA area, but it's all consumed in the higher cost of living. Everything to include food, utilities, gas, etc is more expensive there.
BUT health insurance. It's sooo important as you have seen. It's almost like your injured foot was a warning of what is to come. A warning that you need health insurance.
Sure you can work at Walmart to get insurance. But do you really want to hang your health and wellbeing on one employer? Frist you would need to be hired by them. Then what would happen if they let you go for some reason.
You are not a young kid. You do not have a lot of chances left for you to build a career that will support you and give you the benefits you need.
Your relationship is not going well right now. I wonder if it could ever be solid as he seems to not want to be in the position of taking any responsibility for your needs. One of the benefits of marriage are shared health insurance, etc. So that when one person is having trouble with jobs, etc. the other is there to help them. Second marriages have a 70% fail rate. The fail rate goes up from there the more times a person has been married.
You can meet new people when you move. Go to Find Meetup groups near you - Meetup
and look for groups in the area where you want to move. It will not be hard to meet new friends, both male and female. Sites like this exist because people in general need way to make friends. You will hardly be the only person in your new area looking to establish a new social life.
Take care of yourself.