You probably know the type: a friend who can make you laugh one moment and leave you second-guessing yourself the next. A “frenemy,” if you will.

These frustrating, ambivalent relationships aren’t just emotionally draining —studies suggest they can actually harm your health, spiking stress levels, raising blood pressure and even contributing to faster aging.

“They blur the line between friend and rival, leaving you confused,” psychologist Stefanie Mazer told HuffPost. “Choosing to distance yourself is not about being unkind or punitive. It’s about protecting your mental and emotional well-being so that you can focus on healthier connections and your personal growth.”

She emphasized the importance of seeking out friendships that make you feel valued and letting go of unhealthy dynamics. Although you may find a few benefits to your frenemy relationship, there are more compelling reasons to reconsider it. Below, find five undeniable signs you should consider cutting ties with a frenemy.

1. They begrudge your happiness and relish your failure.