How do you end a relationship?

Going to end this relationship after 26 yrs but trying to do it without hurting the person is the hard part. I don't want to live with another person that just there. We dont sleep together eat together or even really talk together. I stay in 2 rooms and he  stays in the other two rooms. I don't even consider him a roommate cos they pay half the bills. I am now avoiding coming back there. I don't even consider it home anymore. Now the big question is how do i do it.