Do you feel bad for people that never marry?

I have an older cousin who is 39 and unmarried. She has autism (not severe but she struggles a lot socially) so she probably will not find someone. I feel really bad for her.

This life is so lonely when you are single especially when you are 25+, everyone pairs up and focuses on their families and even your own siblings won’t have time for you. It’s my worst fear to end up single for my whole life honestly.