Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it.
I don't believe in things that I can't see.
Consciousness, unprovable by scientific standards, is forever, then, the impossible phantom in the predictable biologic machine, and your every thought a genuine supernatural event. Your every thought is a ghost, dancing.
Love can't be pinned down by a definition, and it certainly can't be proved, any more than anything else important in life can be proved.
Emotions can certainly be misleading: they can fool you into believing stuff that is definitely, demonstrably untrue. Yet emotions are also our indispensable tool for navigating, for feeling our way through, the much larger domain of stuff that isn't susceptible to proof or disproof, that isn't checkable against the physical universe.
Almost nothing that makes any real difference can be proved.
It could be that people just want to be connected to something that's bigger than they are that can't be proven. I don't know, I don't think that's it.
It's not something you can prove....I know you hate to hear this, but you either have it, or you don't.