"Each friend represents a world in us, a world possibly not born until the day they arrive, and it is only by this meeting that a new world is born." -Anais Nin
I've always been against the idea of letting others affect how I feel. Simply because I don't like giving others the ability, the power to get me down.
However, as irrational as this may sound, giving others that power can actually help you learn more about yourself. It gives us the opportunity to grow. We could experience something we thought we never would, feel something we thought we were incapable of, or even find something that we thought wasn't meant for us. Granted the experience could be negative, it still shows us that we are capable of more, or less, than we assume.
We often underestimate ourselves or simply comply with the idea that some things aren't meant for us. Sometimes, we need someone to show us how untrue that can be.
"It's the rule of life: everything you've always waited for comes the very second you stop looking for it."