Though often conflated, there is a difference between introversion (preference towards less external stimuli) and shyness (fear of social judgement). You may be

Though often conflated, there is a difference between introversion (preference towards less external stimuli) and shyness (fear of social judgement). You may be a shy extrovert. Also I can totally relate to the hyper fixation on "what does this person think if me right now with everything I say?" I wish I had a simple super effective answer but I think it just takes small improvements over time. In general, if you're willing to show a reasonable level of mutual interest in the other person, they will reciprocate and with practice this can be trusted such that the anxiety reduces. Also accept that some people will just not be interested or necessarily like you and that's ok, but hard at first for sure, especially if you've faced social rejection earlier in life.