How to get loved one to seek help?

I would like to start off by saying that I love my partner very much and I don't want to leave him when he is suffering. He is very sweet, funny, and considerate. But he is also extremely depressed and hates talking about his feelings (even to me, nd I've been with him 5 years). His family is emotionally abusive without realizing that they are. He only just started attempting self-care, so I don't want to push him into therapy just yet. But he needs professional help if this self-care doesn't work. How do I get him to do that? He is incredibly resistant and says he hates talking to people and that it "won't work anyway because nothing works". But on the really bad days this is having a negative impact on our relationship. He probably sees it as a waste of time and money. What do I do??? I am getting very tired of having to be constantly understanding when he shuts me out.