(((Wolfsong))) I'm guessing you probably open your heart because you want to feel close to people, and hope that this time it will be ok- you wont get hurt or abused or let down. And each time it happens it hurts more and more, and its draining to be like this. I have the opposite problem where my walls are so high I cant let anyone in- for the very reason you have described. The only problem is my heart isnt hard- its fragile and vulnerable and so easily breakable. Everyone in my life, without fail, has hurt or abused me when I let my guard down. So I know it hurts and I know the pain
I dont know how you harden your heart. If you find out could you let me know. I'm sorry you are feeling so down.
