Quiet?

I do admit i have a quiet nature but i can be chatty if i want to. To some friends i have grown to speak out more to them and precisely i treat them as close friends i tot i can be comfortable enough to initiate chats with them. But little do i know as i initiate chats it became an annoyance to them and was asked to dun disturb them.

Conclusion being? Is my approach wrong then how should i go about in improving? Or should i just return back to how i am being quiet and never to initiate chats with people anymore?