Shiiiiit, I laughs out loud alone or around people, even at work when I read a funny text or somethin. If you hear me just bust out laughin, you KNOW it's somethin funny and my co-workers are like "Tell me what's so funny!"
I don't really type "LOL", I usually type somethin along the lines of "HAHA u so stoopid" or "Esstop, u so esstoopid"