If you don’t want to approach the supervisor (I can understand your reasons) but you want something to change then in your position, I would sit down with a piece of paper and ask yourself what exactly you want to achieve, whether it is in your control and then what you can do about it?
1. What exactly do I want to achieve?
2. How much of that is within my control (and therefore achievable)?
3. What can I do about it?

With the last question, challenge yourself to come up with at least ten different things you could do and then see which you think is best to concentrate on.

Give it a try if you really want something to change and come back and tell us what you have decided.

Good luck

Pete