same here, I don't get embarrassed.The only time I "blush" is when I'm running around in the cold. I've never gotten a red face from embarrassment, probably because I'm rarely embarrassed.
Online, I don't blush. I'm not seeing anybody face-to-face, so there's really no reason to. xD In real life, I tend to be a bit embarrassed when I'm complimented. Not for all compliments, though; I blush only when I'm complimented on something that I've worked extremely hard on.
I don't really recall the last time I blushed. I don't even know if I blush because even if I get embarrassed, I don't think I feel the embarrassment transfer to my face. It's just mostly somewhat of an inside feeling. Hmm... Come to think of it, I do remember blushing a long time ago when people teased me because of my crush lol.