This may be a tough one to ask yourself! Sometimes, we know in our hearts and minds that a relationship is not good for us. Or we keep certain people in our life out of obligation because they are family or you've known them for so long.
This may mean distancing yourself from your parent(s), sister, brother, and so on. Here's a few more questions to ask yourself:
When this person is around, do I feel drained?
Do I feel relieved when they leave?
Give yourself permission to let go of those who aren't lifting you up. Even if it's just for a season.
Have you tried this? How did it go?