I don't really understand how people don't "believe" in aliens. Are you trying to tell me that earth is the only planet out of millions of planets to have living beings on it?
The whole argument about them coming not to visit us is also stupid. Why have wee not visited them? Maybe they're at the same stage as us?
Also wee aren't the only creatures on earth. There are millions of species on one planet. Why would there only be one planet full of life and every single other one without? That's like the stupidest thing ever. God is probably the most boring entity, if it does exist, to only make one planet that can't support life.

So yes I do believe in aliens.