I'm Kari and My Tongue is Too Sharp

I don't know if any of you out there have ever had the pleasure of being ignored by a person for longer than you hung out with them. And I don't know if any of you have ever had the pleasure of sorting things out with that person afterwards.
The thing about me is that when things like that happen, I don't feel pleased. I feel bitter. And when I'm bitter I say things I don't mean to, or the things I say come out much harsher than I had intended. It isn't very conducive to making up with people, you know. Especially when you're already on the rocks with them in the first place.
You see, I was hanging out with some people outside... enjoying the last of the summer sun. Things escalated a little bit and, feeling defensive at the time, I found the words "Hi, I'm xxxx and my sideburns are crooked!" teetering on the brink of falling out of my mouth. It was very nearly disastrous. They began to spill out, I panicked, and I swallowed the words. BUT, I made a semi normal situation a bit more awkward because it was pretty obvious that I had just stopped myself mid sentence, and I didn't do a very good job of covering it up.
Sometimes I feel like I wear my heart on my sleeve, in the most confusing way possible.