How do u over come social anxiety?

im usaully okay in my cles but there is a particular cl where i sit in the front and there are 3 ppl in there that im completly uncomfortable being around mostly because they are very observative and it makes me extra nervous its been like this for months now and though i do find these ppl really intresting i try to relax and take a deep breath but its still really hard how do i just chill and feel like there no there i even tried imagining them as some of my friends but its just didnt seem to work idk is there anything? I tthink im just stuck. I also tried some natural calming pills forte but then i feel really wierd like i feel im not there its just idk a very wierd feeling so i dont want to take them