11. They make you feel incredibly special.
Of course, this alone is not a sign of a toxic relationship — you should feel special in healthy relationships as well! But mixed in with all the other red flags, this one is a pretty big one. If your friend makes you feel like you and you alone are the most important thing to them, they probably expect for you to return the favor. After all, it’s much less about your place in their life as their place in yours.