Is There Any Way To Really Beat Social Anxiety?

Because like i'v always Had It since i was about 11....& i Remeber being on the Baseball team & i never really wanted to do much as a Kid but i kinda had a Little Intrest in Bein a Childhood Actor because i did it once for my school in a Skecth...& i always had a Big Imagination & i went thru with it i had to because i Violenterd & i was nurvous the whoole time thinkin like During Reheasrsal What if i suck what if i look retarted & i had no Type of Experiance or trainin & after we did the Sketch i saw my self & im like Omg cuz i hate watchin My Self idk lol....but like when i got into high school...i was Nurvous like man i want to go home & even thoe i had friends that were popular & they knew me i still felt like a Outkast...& when i Graduated in 08 i had got a Job to pay for school & u know i tried workin thru it but yea i had to quite my Job because like i workd at a Hospital in the kitchen & when i came walkin thru it felt Parnoid like they were Talkin about & when i use to talk to people i'll Freeze up..& start to stutter & Figit with my Clothes & now for some reason my Expressions are some times looking Confuse/bored & i always look Tired now my eyes get low & when i try & make i contact i Always look away & its like when i Scratch my neck or something it makes it a Little Better what i really should'nt have to do all that to talk to some body & I Still Want to Try this Acting thing out but me turin 21 it feels like its Goin to Be a Waste