Around this age, peer pressure is inevitable. But, if you give your kid a wide exposure and find things that he might enjoy and be good at, then he will never face the peer pressure in his life.
What you need to know
Make your kiddo understand that following every trend blindly is not feasible. This will make him to find his uniqueness and help him in learning about individuality.
He will not feel secluded or jealous, and most importantly, he will not feel the peer pressure at all. He will take life as it comes; he will enjoy and will be compassionate to others. It is your responsibility to give him the environment where everything is equal and balanced. This certainly will help him to shape his personality and deal with all kinds of situations. This will convert his 'peers' to his 'friends'. This bond of friendship comes only from a person who is secure and confident about himself.
What you can do
Your little one can deal with the change and can pick up things quickly. So if you also teach him that he doesn’t need to follow everything and have other stuff to talk about then he can easily deal with other kids.