Do you think it's okay that I'm developing a crush on my coworker?
Why do you have a crush on your coworker?
I think I like him because he is intelligent and completely different from anybody else.
I know you can't control who you have feelings for, but it's usually not a good idea to date a coworker. It can make the work environment very difficult, especially if your relationship ends. You should seek a relationship with someone outside of your workplace.
I'm starting to realize that you're right. It probably wouldn't work out.
It's good that you're coming to realize that dating your coworker would probably be a bad idea. It's best to not mix relationships and work, because it makes things very awkward.