Why me?

When I ask what people see in me, it isn't a challenge to them, I just want to know why in the world they would choose me. I do not see myself in a positive light the majority of the time. I am not sure that I am worthy of being loved or cared for by someone, even virtually. I think that there are many others who would be better off than me to be loved and cared for. I don't see those qualities in myself that others see. I just want to know, in the end, why me?