Make lists of pros and cons for each possible situation.
Ask yourself about what you hope for in your own life in about 2 or 3 or 4 or 5 years from now.
Do they realize that you are helping them?
You're feeling angry.
Why are you feeling guilty?
What'll happen to them if you don't stay with them?
What'll happen to you if you do stay with them?
What is practical?