If something needs to leave your life it's time to let it go. If something needs to enter, let it in. If you're not sure where you stand with regard to a certain situation, just keep standing where you are until it all becomes obvious. Be aware, though, that some people enjoy creating a sense of tension.
We all have our own ways to handle challenging situations. A common defence mechanism is to pin-point the negatives and then find a solution to combat them. Then, hopefully, everyone leaves without getting hurt.