My stutter caused me a great deal of social anxiety as a kid a teenager. I overcame it by accepting it and telling myself that I don't owe anyone fluency. Took a lot of work and putting myself in positions where I was forced to speak but it really helped. Sure some people still get the annoyed look on their face when I can't complete a sentence in time or they finish my words but in the grand scheme of things it's not a huge deal to me anymore. I just go about my day and repeat that I don't owe anyone fluency. Life is good now.