HAS ANYONE READ THIS, I NEED TO FIND

I VIVIDLY REMEMBER

The mc is very depressed and will never leave his room, another guy ends up moving in later, DOMT REMEMBER WHY, but anyways the mc does self harm, and the other guy is there to save him, I think there was a happy ending?

ITS SUCH W GOOD SAD READ BUT ITS BEEN YEARS I CANNOT FIND IT (￣ε(#￣)Σ