Should I tell the school that I have depression?

I am UCSD undergrad, gonna graduate in Spring. Got grad school offer again from UCSD. But I just cannot hold it anymore. I was immersed with negative emotions and thoughts all days and I couldn’t fight it. I was thinking about go back home for healing and try something different. Should I use this as an excuse to defer my grad school offer at UCSD? I still feel ashamed to admit that I have this kind of issue. I was worried the school may discriminate me. Am I just too weak and not working hard enough? Lol who knows…