What would you do?

I’ve mentioned a few times that I want to go to therapy for my mental health. My partner is totally against it saying that if I were to do that it would end our marriage. I get that he is scared that I would be confiding in someone else when he want me to come to him, but I don’t feel like I fully know how to communicate the things I need to and when I’ve tied everything always goes south. I am even open to couples counseling but I know he hates that too. I don’t know what to do and I feel like we have some communication issues in our marriage. They may be my fault or both of ours and I really want to make things better.