I have to agree with MDM on this one.
I think it's better to have no friends than to have friends that aren't right for you. I never made a real friend until I went to high school and, amazingly, ran into another aspie.
Having the wrong kind of friends can make you feel bad about yourself. Perhaps school isn't the best place to look for friends. You should become involved in another activity (perhaps one involving your special interest), where you might meet people who have something in common with you.
When it comes to actually talking to people and making friends, well, if the potential friend is right for you, you'll probably be able to think of something to say. Just try not to say anything that may freak the person out , and know you can always try again.
I hope this advice helped 
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Apologies for the excessive length of my posts.