My partner pushed me away, along with everyone else because their mental health isn’t well. And, I’m going to miss them.

So, I posted in here a while ago about how to help my boo feel supported through their depression. As we’d dated, they had told me that they feel regretful that their mental health wasn’t really well and they hid it from me, because it ended up causing toxic disagreements. They admitted that I was trying to do everything to help them feel supported and in turn, they hurt me. They said they couldn’t help what’s there mentally and that’s who they are. Along with that, today, they blamed me for supposedly never listening to them. But as the conversation progressed, they’d realized I had been the whole time. When they mess up, they self-loathe and apologize for everything. Granted, we both made mistakes and many of mine began small..as I said, their lack of patience and openness would get in the way and they’d be agitated or yelling and I’d yell back (SOMETIMES). It’s hard talking to someone when you’re in a soft tone and they bulldoze you with why you’re so wrong, they get so poor in their communication, that they can’t apologize for hurting you because they “weren’t wrong”. They start on a high of ego and come down, knowing it messed it all up big time. But you know what I’d done? Still supported them. Because I knew that they needed to heal but listening, they think everyone is supposed to just wait for them to get right but they never want to choose to get better. They “aren’t ready”. Well, I see that.They had the best relationship anyone would die for! We’re best friends and everything else is well but if communication is sucky cuz of someone not wanting to face their biggest obstacle, themselves….how could they love and appreciate you, their family, and friends? They don’t love themselves right and they won’t put the effort in for themselves so they can’t for you. The dream relationship put on pause, not knowing where I will end up. And, it will suck finally waiting my whole life to date them and still not marrying them. They said they don’t want to exist with people anymore because there’s too many feelings. If anyone can tell me what their situation sounds like, it will help so I can pray for them. Also; any advice for me?