hi there- one of the big pointers in Asperger's is sensory problems- eg do you prefer darkness to noon light? have problems with noise/ hate light touch/ find some tastes and smells revolting?
there are some really good online tests for it- google Asperger's test wrong planet and you'll find them- several have been linked here, but i cant find them right now.
certainly having problems wiht other people is a pointer to Asperger's.
certain movements (often small, repetative ones) - slang- 'stimming'- are also charasteric of it, and some odd things too- eye contact avoidance. inability to follow a group cnversation.
one of the most annoying things is a tendancy to take things literally; when i read this the example given was really exreme, so i though- oh, that doesnt apply to me, therefore i dont have it. without realising that it was only an EXAMPLE! (i took it far too literally).
it is a spectrum disorder- so you can have a lot of some things, and show little or no symptoms of others- i dont stim too badly, but i hate being around other people and noise is like evil catnip to me- just drives me loopy!!
each time i come here i read things which apply to me- a/s is the only thing that has ever made sense to me- all the other crap ive had from shrinks and dr's has been questionable.
a word of caution- there are a lot of aspie myths!; eg- lack empathy, are all very techie; we are not ALL like this- remember- its a spectrum disorder!
good luck- let us know how you get on.