I'm fortunate to have had, and have, Ts who are good listeners. I tend to talk over people, and my Ts have all commented on it. They always stop talking when I start, though, which reassures me that they do want to listen to me.
I think it stems from the same thing; I feel like I'm NOT heard, that people aren't listening to me, that I'm not important enough to be listened to, that what I have to say isn't "good enough". That happens in RL but not in therapy. It's always a shock when I find that people actually DO listen to me.
I wish I had some good suggestions for you. You are certainly as worthy as anyone else to be heard and listened to. I think you have to keep telling your T how important it is for you, and keep checking with him if you feel he isn't listening.
Have people told you they don't understand what you're saying? Do you have any idea why? Maybe you're just smarter and think more deeply than the other person!

If your T tells you this, it would be helpful to find out exactly what is confusing him so he can help you word it differently, maybe.