I never actually blushed when it comes to the opposite gender,
I had a blushing fear when I was 13 though while having a first crush/in love thing.
It was so embarrassing, everytime when I looked ''my crush'' in the eyes I was red like a tomato
:
: It was pretty obvious to my classmates that I was crazy about this girl, but I never told her about this. I was feeling very ashamed of my blushing problem, even my friends asked if I were in love, I said ''NO, not at all.''
I couldn't tell them I was... But I know she was straight so that could have been the reason, or the fact that I knew people would pick on me if I tell them I am gay.
Later on, I dated some girls and had a few relationships (now have a relationship,btw) and I managed to stop my blushing fear.
I just know how to control my emotions when it comes to blushing, I can force myself to not blush, so it doesn't happen a lot anymore :]
Though thinking back of school years back then, I feel kinda stupid.
But I guess it is quite normal too, I have this with eye contact basically.
Also, if people give me a compliment still. ;}