I was considering to join a colocation I found on the internet with an advertisement.
For practical reasons (waiting for the rental agreement) the possible roommate proposed me to move in as a guest temporarly.
But it's been two weeks and I discovered that the flat is very dirty and poorly kept.
At first he told me that the previous roommate was neglecting, but now I have big doubts about his previous roommate's responsibility, and serious worries about his lifestyle that I'd have to share.
He told me that he got personnal problems that made it complicated and stated that he was near a mental breakdown, and that he also needed a roommate for financial reasons.
But I have my own problems too and I don't want to sacrifice my health to support him.
Yet, I don't want to hurt him and make it worse for him by telling what I think.
How could I express my worries about all these points without being perceived as denigrating and without hurting his feelings? Is it even possible?