Look for the kids who are different or aching to belong and capitalize on it and approach them. Often those kids and ones who are bullied and even in special ed for example will make the lasting friends you need.
You really need to show people that you are open to them and not closed off. Let them know what you can offer and allow yourself to be approached and make friends that way. You should get involved in drama either at school or take some classes especially improv where you have to work with people of different backgrounds to solve problems. Also join student government or clubs and find people there.
It's a cliche handed down for centuries but there its a fact be yourself and who you are above all things else. That's who people have to be attracted to and embrace. If you accept yourself unconditionally for who you are you'll find others will too as the confidence will be there and genuine. People are drawn to that as they are to empathy which is highly important. Be the first person to help someone else. [ solidadvice4teens's advice column | Ask solidadvice4teens A Question ]
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