The main thing I learned from growing houseplants is to remove dying leaves. Hanging on to leaves that are turning brown only harms the plant. It prevents more nutrients from going to the healthier part of your plant.
This same rule can be applied to your personal life. Remove the dying relationships. Holding on to relationships that aren’t growing holds you back from really cultivating the relationships that are.
Can those leaves you cut grow back? Yes, as long as the root isn’t destroyed. Cut them off and maybe just maybe they will grow back stronger.