You are worthy of setting healthy boundaries.
You are.
What makes you think you have to settle for something in your life that isn't serving you a purpose? How is that working for you?
It is okay to say:
No.
This isn't working for me.
This is not serving me a purpose.
This is not right.
This is not nice.
This hurts.
There is no need to fight or have harsh words. One can do this silently, but each individual is worthy of setting healthy boundaries for him or herself.