Until you learn where the leaks are on your budget, buy a note book and write down every cent you spend. Ask yourself if you really needed to purchase that item. Next ask yourself if there was a way to do it for less cost. When I moved out on my own, I quickly realized that eating out was expensive and I could cook for myself at far less cost.
You might consider other sources of income like putting in an extended shift or working a second job. If nothing else, ask your current employer how you can improve yourself so you will be eligible for promotions. That is a long term solution to your problem and for now you may be somewhat limited as to what you can do.