What should I do?(My boyfriend got depression)

I don't know what should I do. My boyfriend's depression seem to bother me now. Like he only depends on me for an source of happiness while he blocks the rest of his life.

It's scaring me knowing that maybe I won't wake up again or my life can end in instant. He would be stuck back wanting to kill himself. He does have history of self-harm which the first known incident is a early months of our relationship.

Yet now, his parents have to ask me to make him do certain things because if I ask anything he would do it. He has a very small relationship with his father while his mother is kinda there but not. They basically let video games raise him for his whole life. My boyfriend's parents, of course, thanked me for getting him out the house and actually pulling him out his shell but it came with consequences. I didn't know he was suicidal, depressed, and just unhappy.

I know he loves me and just depends on me for happiness but at this point I am starting to feel suffocated under this. I feel bad as if I am putting a potential line relationship for him & his parents. While I feel like I'm hurting him by letting him get over attached to me to the point that nothing makes him happy except me.

So basically I feel bit suffocated by this relationship by my depressed boyfriend who rely on me for a source of happiness. What should I do?