Aliens

Do space aliens actually exist? I am not sure how many of you actually think about questions like this. But it is something that I occasionally think about. I really enjoy reading/watching science fiction. One of my favorite movies is Star Wars and favorite TV is show is Star Trek. So on occasion I wonder about life on other planets.
Now I have often concluded that there is no other intelligent life on other planets. However the other day I was driving all my reasons began to fall apart. I had suddenly thought about angles. Angles are intelligent beings that God has created. Which means that there are at least two intelligent beings that exist. And if there are two why not more?
Right now I do not believe that aliens have visited our planet or that there is any really good evidence that they exist. But I do not have any reasons for them not to exist either.

First reactions

I wonder how a person changes their first reactions. Often in my life my first reaction to things is to see the problems and negatives. It may be a great idea (even the greatest idea ever). Still I often start listing the problems. I think I can see the potential of some ideas. But my first reaction is not to list those benefits and blessings.
And my initial reaction can get even worse if something disrupts my life. I am convinced that deep within is a belief that I am the center of the world. I deny that I believe this but sometimes...