How can I prove that my experience is not just a very vivid dream?

Don't laugh too loudly. There may be no further theory to free us from the weirdness of quantum theory. Within that there is a probability of "melting through the other side"

I'll be back. (bed time)

The Terminator. 

Peter said:

in dreams you can walk in a building.

Long time ago after spending afternoon thinking about how people headbutt the unsurpasable walls of their problems, and somehow sometimes succeed I had a dream where I was facing a brick wall thinking that it's impossible to pass to the other side, and I said ''I know how to do it'', then I melted through to the other side. So, it's safe to assume it was a dream. LOL

Bruce Parry could be a good one to look at in this discussion https://www.bruceparry.com/

'All that we see or seem
Is but a dream within a dream.'

(Edgar Allan Poe)

Dreams are constructed by the human imagination which struggles to maintain internal consistency. By definition the imagination is generally trying to come up with something new. It’s why in dreams you can walk in a building. Walk around for a bit then realise it has more rooms inside than would seem to fit looking at the outside.

so if you’re worried you’re dreaming check for consistency. Seal messages in envelopes and then randomly check later. Read a page in a book then check the same book later. In fact read a page in the middle of a book. Then flip 2 pages back and read forward to the page you just read? Does it match what you remember? Does the text naturally flow into the page you first read?

I should have been a hermit. Unintentionally, I don't fulfil social expectations during face-to-face conversational exchanges so finding common ground on which to build relationships is problematic for me. Empathy is not one of my strongest points.  

Similarly, perhaps, social situations often feel to me as if they've already been rehearsed. With their layer-upon-layer of cultural expectations, display of learned manners and social niceties, I sometimes feel that we are actors who are only-half conscious of the unreality of it all and the innocent artifice involved.

I was reading yesterday about the Beatles song 'Penny Lane' with its brilliant line: 'And though she feels as if she's in a play, she is anyway'. Seems apt.

I am a very pragmatic person who struggles with abstract theory, especially so with the unresolved debate about our role in "making" reality be it through five differing interpretations with collapsing wave functions of quantum theory views, e.g.: Copenhagen Interpretation, Multiverse interpretation, Bayesian's Quantum view, Objective Collapse Theory, or The Pilot Wave Theory.  With such confusion how can any sense be made of reality.

That's so interesting and something I've often felt and wondered as well.

I don't think there's anything wrong with feeling this way. I think a lot of people do. I've felt this way for a while, intrigued by the idea that all this is just a dream and one day I'll wake up. To me that's what it feels like this journey is taking me towards, waking up for real.

you cant really prove if your dreaming or not, because dreams can feel hyper real and in a dream you can often question whether your awake or not and think in that dream... yeah this feels real, i am awake...  even if its so unreal your mind still thinks its real, even when familiar things are warped and you should know its not real due to how different and warped it is your mind and being still says it is real and you think your awake... so whos to say, perhaps we are just in another layer of dream right now and are not yet awake.... perhaps when we die we wake up? or we just transition to yet another layer of a dream. perhaps all of existance is just a singular massive unending multilayered dream in multiple other dreams. in that case dream is reality and we can never wake up only go to another dream.

A famous philosopher call Descartes asked this same question in 1637!  He questioned everything about his experience and eventually ended up with "I think therefore I am" and built everything back up from that. 

He pointed out that senses and reasoning are both unreliable and sometimes trick us, so the one thing that we can be certain of is that by thinking we know we exist.  And philosophers have been considering this question ever since, so you are in good company!  Have fun going off on a deep dive into googling philosophy.  

My response is unlikely to be helpful, but just to say that there have been times in my life when I've momentarily questioned whether I'm actually here in a conscious state, or am just dreaming that I am.

Sort of linked to this will be a fleeting sense of paranoia and panic that people can hear my thoughts when I'm out in a public place. I find that I have to make a point of checking that my lips aren't moving and that I'm not voicing my thoughts out loud. 

I find these moments most bizarre and unnerving, but after a few minutes, I've usually forgotten all about them, so don't give them a second thought.