drifting away on tears

Where do I begin?  One minute i'm ok and the next my thoughts just flow into sadness and anger, over what?? Over everything like being a single mother and having to deal with the father of my baby being in and out of her life, keeping my job I hate so much so I can make sure my baby has clothes on her back and to add the stress of trying to act happy all the time.  My emotions fly so high that it's hard to deal with reality sometimes, can I just run and hide in a closet for a little while? Or will that make me feel even more alone?  I know family and some friends are standing beside me there to catch some of my tears and calm my anger but sometimes that's just not enough.  My smiles are on my face to hide the pain on the inside, I am happy for the most part but there is a part of me that just doesn't know how to handle life so it just turns into jealousy, pain, anger etc. and when it does I just break down.  If I crumble into little pieces will you be there to tape the pieces back together?  I love everybody who is there for me and who helps life me when i'm down, do you feel the same way?