Well, do you? I have an uncle who is into the conspiracy stuff. He firmly believes that the government has made contact with other intelligent beings and is hiding it from us. I don't personally buy into that theory, but I'm not going to rule out the possibility that there's another life out there. Where do you fall on the alien scale?
I don't have any clear indicators but I have some belief the information gathered in all those movies and articles on Aliens is far too compelling and might bare some truth. Anyway, I am a 50/50 believer if there is anything like that around hoping to get clear proof to remove my doubts though.