Take your time to be comfortable with the people around you.
I would highly suggest that you hang out with people who have same interests or anything in common with you.
After a while, you will find yourself being comfortable with having conversations and hopefully open up a little bit more than usual.
This process takes a little while if you have tried it and it does not work then maybe you are mixing around with the wrong people.
Go around and have the courage to explore and meet new people. There is so much more in you than what you limit yourself to.
Firstly, you have to accept that not everyone will like you & will want to be your friend.
But that does not mean there is something wrong with you and that you have to change yourself just to fit in with the wrong people.
Never force anyone to like or befriend you because real friends accept you for who you are.
There are only 2 types of friends, Fake and Real.
Fake friends are only there when they need something from you and during good times then disappears like they never existed when you are the one who is in need.
Real friends will be with you all the way through good and bad times,
who will always be ready to fight and do anything for you,
encourage you when you feel like giving up,
listens to your repetitive boring stories.
Friends come and go but the real ones will stay through thick and thin.
Real friends are rare and hard to find but when you find even just one, keep and treasure him/her.