I feel as though I've come a long way with battling social anxiety and a lot of times believe I've completely overcome it only to be slapped in the face by reality. And that often comes in play when flirting/being flirted with. 

I rarely if ever initiate it but I do put myself out there be it through partying or clubying or whatever. So as a girl I think I might have a bit more luck in the sense of having guys taking the first step more often than not. And even then I'll ruin it with my awkwardness. 

It frustrates me so much because as soon as someone shows any interest in me the kill bill sirens go off in my head. Worse if I find them attractive. I'll just not know how to act anymore. 

Few days ago I was at a party and a girl approached me and since I'm into guys it should be no problem, right? No. Still wanted to run a mile. So I told her I was sorry but I wasn't into girls, she said it was okay and changed topic, tried making some friendly conversation that I inevitably nuked by losing ability to carry a conversation. 

Does anyone struggle with this too? Or have some advice? I wish I could at least stop sending the wrong signals due to anxiety.