Stephan wrote:
Can someone tell me how to tell for sure if I have Aspergers?
For as near sure as you can get, you'd need a diagnosis by a professional with experience in assessing AS in adults. This would include a careful review of your childhood, because development signs are important in differentiating between AS and other possible conditions.
Before going that way, which might be expensive apart from anything else, you may want to increase you confidence that that would be a good move.
You've listed some of the clues you've picked up.
Reading here you may also pick up more clues if you find the way people post about their thoughts and feelings resonates with you.
There are also some on-line tests or questionaires, such as:
http://glennrowe.net/BaronCohen/MaleFemale.asp
which again might be suggestive.
There isn't a simple test score that confirms or disproves the condition.