Of cource it's always hard to fit in but like others alisema be yourself. If people don't like wewe than find others! My kauli mbiu is 'It's impossible until you've got someone to help you' and that also means that wewe have to be with people who are willing to help, not just for hanging out. And if wewe don't hang out with your Marafiki than either you're not up for things enough au they're not your kind of people.
I'll give wewe the Disney answer and say: DON'T FIT IN, STAND OUT! Nah, I don't believe in fitting in. I believe in finding people that share common interests with you. Having Marafiki that wewe can just be total dorks with and act crazy together is the real way to "fit in", mostly because that's when you're happiest.
As for why wewe don't hang out with your friends, um idk? If wewe want to hang out with them throw a party au text one and see if they wanna go to the sinema au do something.