I say go with the night school thing. Even though you will be doing the same job you will be on the road to something different, you will have a plan and that will help you feel better, as you will no longer be working in a job you don't like for no reason. YOu will be working in a job you don't like to pay your way though school and start on something you do like. It will be hard but any thing that is worth doing is hard. Maybe take a few weeks off work if possible go on holiday and have a think creat a plan. YOu will feel better.