I Don't Want to Be Talkative

i always think i am a introvert. And i am satisfied with it now. But i found that i am a little talkative when with some people. And it changes automatically. Maybe i feel lonely inside myself. i think everyone may feel the same. But i really don't want to be talkative. It looks like skin-deep.i always say some funny things, but i only want to express my humour to some particular persons.

Everyone has many faces, and i can't control its changing.