all of my friends are extroverts. and i really believe that they do not understand me, as i am an introvert. i talk about my interests instead of the things i do, which they cannot relate to at all...and i do feel pressure from them that i have to be this different person in order to be good enough for them. i feel that being introverted is abnormal, like it is a sickness that has to be cured. i feel pressure to go to parties, to go out every night, to have tons of friends. but i have to ask myself, is that what i really want?? i like being alone, i like keeping to myself and have some hobbies. going to parties doesn't appeal to me. i would like to be able to be comfortable at parties (aka not have SA) for the odd one i go to, but i honestly don't like parties. if i did not have SA i still wouldn't go to a lot of parties. but i do feel pressure from everyone that i have to in order to be normal.
and it is not that introverts are shy. introverted does not mean the same thing as shy. introverted just means you work better in small social situations with only a few people. large parties zap all of your energy because there is too much to focus on. when you see friends you want to have real conversations about things that matter, and at large parties that is impossible, so you just feel drained of all your energy. it's not that you are shy. you simply don't like to do it (it being socialize at large gatherings)
and just remember to keep in mind that SA is also different from introversion and shyness. SA means that there is a fear involved in socializing. Introversion, shyness, and SA are all different things. related, definitely. but fundamentally different.