aspergers?

how do i know if my son has this disorder??? in a family practice i worked at a couple of years ago we had a patient with it and i thought my son had some similarities. he has been diagnosed with ADHD and ODD. hes on meds and does pretty well. he is at or above grade level in school. my concerns are his social interactions with others..i have noticed more and more that he does not give eye contact while talking unless asked for. he does not notice personal space. ive noticed in public he will stand really close to people in line. i know something else is going on with my child but im not sure what. we recently move to florida so i am getting him plugged in to  mental health professionals. he cries in my opinion more than a normal 8 year old boy should. i have to constanly repeat myself about daily activities. hes not very cautious about looking for dangers while riding his bike in the parking lot. he is a little clumsy. he plays soccer but gets very angry if he doesnt score a goal or runs fast enough. if he falls he just lays there and cries. sometimes he makes weird noises that make no sense. if he has even a small amount of sugar he acts up. im not sure how much of this is normal. any ideas or opinions will help.. thank you