im a very silent type.
especialy with ppl i dont really know.
i can start a conversation with ppl i dont know, and with ppl i know very well becaus it comes natural.
but with neutral people i just completely shut down...
like with my (previous) boss. it was pretty much dead silence all the time becaus i have no idea what to talk about to him.

besides that i always find it difficult to keep an conversation going