Crying is a physical and emotional need, like how much better you feel after emptying your bladder? Suppressing it can't work anymore than one can cry one's self to death (I wished and tried) because it is part of our physical systems and not regulated by will (as you've discovered).

http://www.emotionalprocessing.org.u...0for%20you.htm

You are not weak or stupid for crying anymore than I am weak or stupid for having asthma and not being able to breathe well. Crying can feel uncomfortable or embarrassing but I learned to just ignore that, just keep working on the conversation I was having with whomever and let my body do its thing. Our bodies are part of us and extremely helpful to our functioning well.