Girls show attraction for me, until I open my mouth?

And my social anxiety and inability to speak properly get in the way.

24 and never been lucky with anyone. I've had girls admit that their friends felt attraction for me after whatever movement I did, which is so incredibly odd to know. But I have seen that aswell. But then I open my mouth to speak. This is why I'm always the quiet guy who struggles so much to speak to others.. I am so insecure about what I say or how my voice come out that I end up messing up what I say, of course, and give out really bad vibes that others want to stay away from. And those who do give me a chance I offer them nothing, so they leave. I'm that guy who manages to be submissive towards 99% of people I meet and it is so counter productive because i am literally asking to be bullied and be taken advantage off. It feels like I'm wasting all my potential non this life and eventually Itll be too late because girls will stop looking at me the same way. I'm mentally ill. And I hate being socially aware of things without having a clue of what to do everything.