Social Anxiety making me look like a nasty person

25(M) I'm really stressed out and depressed on why i can't socialize like a normal adult would, Specially in social events where family and friends will gather, i would definitely avoid interacting new people, with certain people i would be like shaky, can't look in the eye and will make it quick to avoid to look or sound stupid but that's it only results in opposite and it always makes me look like a snobbish person which makes my anxiety worse.. i dont know how can i help myself with this, physically and mentally it's like im on chains socializing..