Social anxiety can be difficult to deal with, but there are things you can try yourself, as well as several effective treatments and support groups that can help you.
Things you can try
Self-help probably won't cure your social anxiety, but it may reduce it and you might find it a useful first step before trying other treatments.
The following tips may help:
try to understand more about your anxiety – think about what goes through your mind and how you behave in certain social situations to help you get a clearer idea of the problems you want to tackle
replace your unrealistic beliefs with more rational ones – for example, if you feel a social situation went badly, think if there are any facts to support this or if you're just assuming the worst
don't think too much about how others see you – pay attention to other people instead and remember that your anxiety symptoms aren't as obvious as you might think
start to do activities that you'd normally avoid – this can be tough at first, so start with small targets and work towards more feared activities gradually