My (25F) bf (25M) depression is draining my life?

I (25F) have been with my boyfriend (25M) for 7 years. He has always been unhappy since the day I met him. He hated his college, hated all his jobs, hates the town we live. I tried to understand I really did. I’ve been with him through his identity crisis (that is still ongoing). We still don’t live together because he wasn’t in a mental space to do so. He has now moved in with his parents who clean and cook for him and I don’t see him more than once a week. He says he feels that nothing matters, that his job is draining and he can’t do it anymore. And I have no compassion for him anymore. I also have a job and bills to pay and no support system around me and my life is also exhausting. But all he does is being unhappy. Therapy - he doesn’t believe in it, I have pushed him to go multiple times. I myself have never struggled mentally like this and I feel that it can be my ignorance that doesn’t let me fully understand what he is going through. I don’t know if it’s REAL or if he just feels sorry for himself. All he does now is play video games after work and just talks about how much he hates his job (this job is objectively not a bad place to work - with the flexibility to work remotely and good management). It’s so draining to me to be around this negativity for years. He has never been happy, it’s always something. He gets so tired working - doesn’t EVERYBODY? I just feel like I am becoming an angry mean person that can’t be understanding anymore. I am supposed to wait until it goes away by itself and be understanding? I am so tired that it’s always something negative but he feels that nobody understands him.