Thought Stew

So, tonight I was sitting on the bus stewing about some things in life, and then I found myself stewing about stewing. Lately, I've found myself being frustrated by things, and then spiraling into being frustrated about being frustrated. Or getting angry with myself about being angry.

Which leads me to one thought/question/pondering/etc.: why do I let my emotions let me get more emotional? Is this a "girl" thing? Does it prove that I'm human? Or am I simply over-thinking things, and I should let go and stop stewing? I don't know the answers to any of the previous questions, but I do know that I need to relax more, because when I'm relaxed, I'm less likely to stew. So, I'm going to go and relax now. :-)