How do you think people see you?

That is a question i have been asking myself for years, i have no idea!

Whenever i see people looking at me i always tend to assume the worst, especially if they smile or laugh, i feel its more at me and not with me.

It makes me want to hide myself from the world sometimes, though i never actually know what they are smiling or laughing about or why they are even looking at me.
But it always brings up that question, why are they looking at me? What do they see?