You have probably heard some pretty insensitive comments when you mention your pain. I did too. I don't talk about it anymore either because of that. If I do talk to someone, it is because I know they will not say that to me or I am talking with someone who is living it too.
Living with pain and trying to explain it to someone who doesn't understand can be very frustrating, and the things we hear can be hurtful too. There will be people in your life you can turn to and talk with, and there will be others you can't. Learning which people are which can be a painful lesson, but in the end, the people who are left are the people you never want to let go of.