I agree with most of what has been said. Obviously no alien races are visiting the planet right now. Also I doubt even if we someday find extra terrestrial life, that it will be human-like. Just because things on earth evolved generally to have 4 limbs and a head, doesn't mean that's what will be dominant on other planets. Indeed even on earth there is a huge variation.
I am pessimistic about ever finding intelligent life and/or traveling the universe. But you never know, my ancestor could one day captain the Enterprise against the Romulans.