Hi ms. @sitaraindaryas
I also don't believe that aliens are creatures living on planet earth. Considering the vast universe and no technology that can explore it makes me a little believe that the possibility they exist in another solar system. However, according to some videos I watched, aliens have visited earth thousands of years ago to help humans with their technology. However, this is still a mere conspiracy because there is no evidence to support it.

Warm regards @muhammadikramm