"just don't meet people because they don't communicate via your one specific method"
That statement applies to the person who won't be your friend because you don't have an Instagram, not to the person who refuses to install an arbitrary app as a precondition to becoming friends.
That statement applies to the person who won't be your friend because you don't have an Instagram, not to the person who refuses to install an arbitrary app as a precondition to becoming friends.