You'll need to be more specific.
unrequited love.
Caring person
Self-Centered
This means you can swim or someone thinks you can swim.
they are usually called hypochondriac or suffering from Munchhausen syndrome
The word for someone who thinks they are perfect is "narcissist."
This episode was called Major Topper, and was in series 6.
You can, but usually what someone thinks can be written in italics.
When someone thinks that means they have there own opinion. When someone believes something that means they think it is right.
The term for someone who thinks they are superior to everybody is "narcissist" or "egotist."
what someone thinks
The term for someone who thinks of others is "considerate."