I'm so sorry you feel like this. I can relate. Now that my children are grown and my (abusive) parents have died, I no longer work...I feel like I have no purpose.
I feel like a failure. I cannot cry either. Life hurts.
Please don't apologize for saying how you feel. I wonder how things will get better also. Will they?
I wish there was some way I could help you , but all I have is empathy.