Thank you! I love your hair, too! I usually wear my hair flipped to one side (either one, just never really down the middle), and i think that's where the volume comes in. It's never been thin though. I don't have any layers at all! It's all one length, with MAYBE a few pieces shorter than others because I trim my own hair & it never looks perfect. I want some layers, but I'm scared haha.
My hair has lost some volume and curl pattern, yes. If I cut it, it would bounce right up. Not as much as yours though, I have more of a long "S" shape. However, I don't really mind what it's become. I feel like it's less poofy which I like, lol.