When you keep a secret and let it out to someone you trust that's one of the best feeling. Not all your friends will understand but your true friends will always have their way to understand it. 

Having a trusted friend(s) to talk to whenever you feel happy or alone was truly need to be thankful for. You may sometimes forget them in times that you enjoy company of others but they're still there to understand that you also have your own life that you need to enjoy and you also have problems to face by your own. 

Communication might be one of the vital element for a best friendship. Some said that you already forget them when you haven't say a thing during the time that you've had a relationship and some might cause misconception that we only communicate to them when we need them.

Inspite of those circumstances I mentioned, true friends will always forgive and understand it as long as you're willing to make a change to improve yourself on how you treat them and not taking them for granted.