Depressed

Hi having lost my wife to myloma 8yrs ago,and myself getting over lung cancer surgery radiotherapy etc still not coping. Tried alcohol pills for depression, I have become a very angry man.take my anger out on every one.youngest daughter doesn't understand,oldest daughter was a great support but with a marriage brakeup and a stupid row caused by me have become a sad lonely old man.don't feel wanted by anyone can't seem to do anything right.cancer has destroyed me all together. ( lost ) thanks.