Aliens...?

Im not too sure if we have been visited by Aliens yet, but I think theres a big chance of life out there. Of the whole solar system, what are the odds of Earth being the only planet to support life. Its all possible. However, I dont really believe that every Alien race would be super intelligent and able to communicate without speaking. I think if an Alien race exists, they're probably similar to us; ignorant, fighting baseless wars, on the verge of nuclear war, and also wondering about lifeforms other than them. They might even have their own Paris Hilton equivalent.
I think that they are probably also stuck on their own planet, maybe only wondering around on their moons just like us.
Ive heard that if you want to travel to different planets, faraway planets, the cost of public transport in space is too great, extremely unreliable, and unsafe due to space cowboys.