You've got to talk as though you don't expect to be ignored. I used to do the same thing, and I see you doing it too -- all the time. It's truly a shame, because I know you have things worth saying.
To get other people to listen to you and like and respect you, you have to be honest. With them, but first with yourself. Have enough self-respect to not let anything come out of your mouth that you don't fully believe.
I know it's difficult to talk as though you don't expect to be ignored when you're used to being ignored. I know it's scary to not be able to use the lines you have saved up, but that's what you have to do. The lines are clever; work them into short stories, maybe. They don't have any place in your real, unscripted life. "Be impeccable with your word" is the way one person put it. Say what you mean and mean what you say. Life instantly becomes a lot simpler when you do, trust me. I mean, I still slip up, but I'm a lot better than I used to be. Eventually, people will begin to notice and pay attention. If they don't, then you don't give a fuck about them anyway -- and that's not just something you'll be saying, you really won't give a fuck about them, because clearly, their values don't go along with yours. The ones you will care about, and who will care about you, are the others who are being as honest as you are and have discovered, in your mutual honesty, that you agree about things.