I can't think of one person who has made my life worth living. I don't have kids. I imagine kids are the only answer to this question.
I've had a lot of people that I care a lot about...that I've loved...that I don't want to ever live without...but there is not one single person who makes my life worth living. I think that is a lot of pressure to put on one single person. It sounds like something a stage five clinger would say.