If you plan on making someone part of your life you should let them in on the happiness and the pain, no matter how much it hurts. In time keeping them out like that will push them away, and if you tell them, who knows, they might help you with your pain. Sometimes your pain can put a steel door in your way to the world, but if you let someone special or that you love in your life, sometimes its best you give them the key to let them in to you.