If your daily lexicon is riddled with "text speak," or gangster-isms, it's a clear sign that you're still an immature douche. "Omg, I cnt w8 2 c u 2mrO 4 ur paRtE!" or "Omg, man. I was, like, yolo, you know?" doesn't make you look cool, and isn't even English in either case.
Chances are you have at least an eighth grade education, which means you're fully capable of stringing together simple, and even minorly complex, sentences. If you're out of high school and you're still talking like a too-cool-for-school tweenager, you're an immature douche.