by the way there is a link somewhere here on suggested books that will help. I have read several and they will help with any self esteem issues. You need to know that you are not the problem. You may have qualities that you can improve to have a stronger realtionship but YOU are not the whole problem. If you were then your husband would have left a long time ago. The little things just build up and then unfortunately different people deal with them in different ways.
