If you are asking is there life beyond our little planet then the answer has to be YES !
Look at the night sky, that is not just our solar system or even our own galaxy, some of those pinpricks of light are themselves galaxies. Our galaxy the Milky way contains a thousand million Stars like our own Sun the possibility that planets like ours orbit at least some of those suns has to be an infinite possibility as does the existence of life on those planets.
If on the other hand you are asking have we been visited by aliens and is there a likelihood of meeting little green men the next time you go to the woods alone I would have to say No ! The sheer mind boggling distances they would have to travel at speeds far greater than the speed of light (which is impossible by the way) just to get here is beyond acceptable belief.
Are we alone in the Universe ?
Look up to the sky at night and try to imagine just how big it is.
So if we are alone wouldn’t you consider that a complete waste of space ?