Did human being ever find any gravitational waves yet? I know we have gravity force on us, but I ask "Gravitational Waves".?

None observed, but that's because everything that makes waves is too far away. Moons orbiting planets don't make big enough waves.

You are actually feeling a gravity "wave" right now. Constant, unchanging gravitational force is like a DC voltage on an o-scope: it's the same thing as a sine wave; it just doesn't go up and down. A smooth ocean with no waves doesn't mean that water doesn't exist.

Also, gravity waves are MANDATORY if Einstein's GR is true. That means the proper answer is "We're almost certain they exist; we just haven't been able to detect them yet because our equipment isn't sensitive enough."

As it is, we could only see a nearby, HUGE mass moving back and forth. Even stars orbiting each other in the Centauri system won't feed the bulldog.

There is some indirect evidence in observations of massive binary stars in tight orbits around one another. According to relativity, the binary system should radiate energy/momentum away in the form of gravitational waves. Observations show that at least one binary system is radiating away energy at exactly the rate that Einstein's theory predicts.

The problem with the actual detection is that gravitational waves have extremely small energies and the physical mechanism to detect the waves has to be able to detect tiny stretches and compressions of space-time. If you were to imagine a circle of space-time with a gravitational wave passing through it, the gravitational wave would alternately distort the circle into an ellipse with the major axis of the ellipse in a horizontal direction, and then the major axis in the vertical direction, and so on. This distortion is extremely small - just think how much a detector might expand or contract just due to thermal effects, vibrations, etc.

I don't think that they have and it is possible that they never will.

Unless gravity actually IS a wave then it would be difficult to find gravity waves.

This is only one of several hypotheses as to what gravity actually IS.

No gravity waves detected. All theoretical frame work is OK for their detection; but perhaps our instrumentation (larger Spatial frames & intervals of thousands of years) doesn't meet the very stringent demands & repeatability is unachievable.

No. There's two labs built in an attempt to detect them, but as of yet - there's been no positive results.

No,

they are still little more than speculation based on an old theory which tends to be taken far too literally.

Cheers!