stop blushing

The last 4 years has become quite literally a joke. I can be very confident, in fact sometimes arrogant but only recently I found that I started blushing the most normal occasions. I was sat in class and i nver used to struggle when asked a question, but for some reason I blushed uncontrollably. My heart fluttered, sweat eminated from everywhere and my face burned red. Then the shear fear of that ever happening again was enough to trigger another episode. After that, every social event, conversation and even when i was around people I went a darker shade of crimson. my family began to notice and my popularity dwindled. I dont achieve half the amount to which i used to and find it hard to keep a relationship with a girl. I cant even talk around the family table without blushing. I have felt suicidal because of this ridiculous problem. I need help.