If someone is thinking romantic thoughts about the same sex then they may be a homosexual.
When Someone thinks you are bad but your not
he thinks you are stupid.
This means you can swim or someone thinks you can swim.
Well, it means that she thinks you're amazing.
someone who thinks they know everything when they really dont
It means that they care about more than just the way someone looks... Just because someone thinks your hot doesn't mean that they think of you as someone good to go out with. I think that Jessica Alba is hot but that doesn't mean that i would like to go out with her if given the chance.
It means someone thinks very highly of themselves and/or thinks they're better than others.
Someone who is obese and thinks that their sexy and can rule over everyone else.
Assuming you mean Willow Smith, you will have to ask someone who thinks there is something bad about her.
it means that she thinks that you like her and she likes you to
Someone who sells something, or thinks up a plan to sell something.
He probally thinks that you get that alot (prob cause he likes you) and Thinks you might be seeing someone.