I honestly have felt many times that the reality that I see might be the true reality. Everyone could just be a product of my imagination. No point of arguing it because how can you argue with my imagination? I take the reality with my own thoughts. Everything is truly 'make believe' to me in my own head. None of you really exist.
--Thank you LSD
Well, the "us" you have in your head
is a figment of your imagination/mental processes [or whatever]. That much I can agree with. I mean, "Shinigami357" doesn't really exist; there's a person behind this persona that you don't know, and therefore, your perception of me as I am under this persona, is, as you said, all in your head. [though you've prob never seen me before even in the temp]
That is, of course, working under the assumption that everything is in context. I'm not sure how context works if you're high on drugs, but that's a different topic altogether, and I'd rather not prove Densetsu right in this moment in time.
Now, I'm a big advocate of life and such and choices [and whatnot], so really your questions regarding our existence [or at the very least your existence] should really be yours to answer. However, I am free to share my input, so...
First, why are we here...
Well, to be perfectly blunt, the best answer is simply: because [just 'coz]. Straight up, the reason we are here, is because as living creatures bound under the immutable laws of our universe, this is one of the rare places we
can exist.
why do we exist/what's the reason for our existence...
Well, I don't really believe in 'reason' for existence. The reason we are alive always changes from moment to moment. Pin-pointing it down to one thing is not a worthy thing to waste time on.
The whole "raison d'etre" thing doesn't really ring true. I mean, if you came down to it, everything is in the moment.
Seriously, in the great scheme of things, the universe doesn't really give a damn about our wants and needs. Our existence in those terms borders on the insignificant; trying to understand or justify it because we want to doesn't make our existence any more important.
That's how life works; this moment is it, this is life. Really, why bother yourself with all of it?
The only reason we really need for life is simply to live it. Why complicate?