Unfortunately, when we're depressed we don't always demonstrably respect and value our own opinions, and when people sense that they naturally fall into line with those actions.

As Serzen suggested, maybe practice speaking more directly, with more authority, that people will perceive it existing? Or if they don't seem to respond to something you've said that you think has greater value than they've realized, you might ask them, "well what do you think about it" etc.

I grew up in a loud family, where everyone is fighting to be heard over the noise, and although I grew up lost in that shuffle, these days I speak with authority and especially when I know it's a topic about which I can make a valuable contribution. They've learned to listen more when I speak because it's hardly ever something frivolous, that I don't chatter endlessly, but more often only speak concisely and clearly about things that help others to get clarity. I think every person has the individual task of having to find their way with communication, how to speak in a way that they're best heard, and teaching those around them how to hear them.

There's an expression "help me to help you" .. you just need to help them to help you, essentially.