It sounds like a very difficult thing to cope with. At the root of the issue it seems like you are not feeling supported and honored. These are two important elements that you need to have in order to feel better. Both are likely to happen in therapy.
I would use the “Find Help” tab at the top of the page to look for people in your area that you can begin talking to. If money or insurance are a problem I recommend checking out your local women’s center or community hospital. They often have therapy services available for little or no cost.
When our primary people are not there for us it is very depleting. A therapist can offer support and help you sort through your options in dealing with your current boyfriend. Without this feeling of support confronting him, trying to manage change may be difficult. Our video series on relationships might be helpful. Check out this one.