Stupid Boyfriend

My boyfriend continues to make stupid decisions that have life long consequences, we work in the same place and just last weekend he got fired for stealing a bartenders tip out of her jar. He said she owed him the money. It was stupid, for 10 dollars. Now he is jobless. He has done other stupid things that has ruin his clean record due to other STUPID stuff. I just don't know how to get through his head that these stupid mistakes is ruin our lifes. You can't get a job with a terrible background, and you can't provide a living for a baby if u don't have a job! I just don't know what to do. I'm tired of helping him, when he continues to make dumb decisions.