I was so nervous and delirious about the proposal I had made
Why would you feel so nervous and delirious in this instance? Can you tell me the full story?
I don't feel like I could tell you the full story.
It's okay to be unsure about yourself before speaking in public.  However, if you are feeling delirious, that may be something you want to ask about.  Professional help can get you over your nerves.
You really want me to talk about it right?
Yes, it is good to talk about things that made you feel such a way and being unsure of yourself is very human. You may feel better once you let it out.