To find "real friends" isn´t that simple. Most people we meet will stay "acquaintances" - someone to talk with, but not someone we deeply trust. In such a short amount of time it´s nearly impossible to say whether they fit you or not. They might be only pretending to be too cool for you and in fact are only afraid of being outsiders. Who knows how they behaved in middle school? Let some time pass - perhaps you´ll be able to form a deeper bound or even realize their facade.
In case you´re sure that they´re absolutely not your "type" (wrong interests, wrong worldview etc.), go and search for someone else before becoming their "shadow" - someone who follows a group without being an important part of it, someone who´s often made fun of. There might be few students in your form, but aren´t there other students too? Try talking to others when feeling lonely.
And most importantly, don´t fear to be alone! Having no friends in school doesn´t instantly mean you´re strange. Sometimes it´s better to have no friends than to have the wrong friends. Remember, you´re not alone - you have the Dollars!
Sadly
>>3 is completely right with "school friends come and go". Although it is not only "school friends". When we haven´t got enough time to take care of friendships we obtain, they fade away before we recognize. In case you had some friends in middle school you deeply care about and don´t want to lose, try to contact them at least once or twice a week and try to meet them, otherwise they´ll be gone.