I think what's absolutely key here, is that we first must define what is, "Real".
"Real" can be different things, to different people.
Do you think life here on Earth, is, ..."Real", just because when you miss with your swinging hammer, and hit your hand, it hurts?
Allow me to tell you that, pain is identical, even when you are somewhere other than here, only more so.
"More so", in that, any one who successfully travels, either astrally, or lucidly, will tell you that it is far more, "Real" than being aware here on Earth.
How can that be, ...but it is.
So, being somewhere other than consciously here on Earth, is "more" real than being on Earth, what does that tell us? That Earth is real, or that they are all real?
I once read somewhere, that, reality, your own personal reality, is where your consciousness is one hundred percent focused at that given moment.
That statement is very heavy to grasp, but if you take your time, and tear that statement apart, it works.
For instance, why do you awaken from a nightmare, sit straight up, and thank God that, that was only a dream?
Because while you were there, in your nightmare, your complete conscious was one hundred percent focused at that (location/plane/level) etc., and when you "woke up", did you really, "wake up", or did you (re-focus/shift) your conscience back to this plane.
While you were there, in your nightmare, that was real. That was your reality at that point in time. That's why it had such immense impact on you. Do you think anything, "fake" is going to effect you to that degree? And then, you may argue in your defense, that in your dream, you saw three headed pigs, or what ever scenario that would not be of "this world". While in your dream, you weren't hear, in this world. Physically you were, but that physical part dies, and decays eventually. You visited that dream world, with you conscience, which never dies, or decays, because in its fundamental form, is energy. Again, each, (world/level/plane), would have its own, "rule set", ie things that are normal on that plane of existence. And just because we don't have three headed pigs on earth, or, this plane, doesn't mean that three headed pigs aren't the norm, wherever you visited.
Look, we all die, animals die, plants die. That, in and of itself, proves that here, Earth, is not the Be All, the End All, the Cure All. If it was, nothing would die, we would all stay here for eternity".
So that means that we have to start looking beyond the scope of "man made" science, and thinking.
Science is a good thing, don't get me wrong, and it strives to make logic out of things on this (level/plane), but science is limiting, at best. Science can only accept as reality, things that science can prove. And any logical thinking entity, is fully aware that, things such as space, the human mind, astral travel, etc., are to vast, and ineffable for science to lasso, just yet. And just because science can't prove it, ...it's fake, it's not real, it's folklore, it's chemicals in a dying brain.
Well, thank goodness for the new wave of scientific thinking. It started with Einstein, and has been growing, albeit slowly, ever since. More and more scientists, as well as physicists, are finally realizing how narrow minded, and dogmatic the science of old, really is.
Immense leaders on the forefront of this new revolution include Dr Eben Alexander, and Dr Thomas Campbell, both of which have enormous resources available on YouTube.
Dr Eben Alexander for instance, a neurosurgeon and staunch believer that when you died, that was it, had a near death experience, now fights to the death to say that we are all wrong, that there is more than here, and now. This is a scientifically, and medically trained professional, who after only one near death experience, is re-writing his entire philosophy of existence.
So in closing, "never say never".
Just because science cannot prove something, does not mean that it doesn't exist.
What we discuss here on this Forum, astral travel, OBE's etc., is light-years ahead of "today's" science. Not that sometime in the not so distant future, science will finally be able to test this type of travel, but for right now, they'll just have to deny it. Far too many human beings, having far too many unexplainable experiences, for it to all be fake.
Stay strong, continue to explore things you cant yet prove, and use, as Dr Thomas Campbell bases all of his experimental travel on, ..."open minded skepticism".