It's about you and what you think and want. State what you think and what you want. Then the other person can make an informed choice. There's no confusion about whether or not you asked them to go. You know, in the first example above the guy might have thought that he asked his friend to go to the movie, when in fact he never did.
Some guys think that they've been rejected by a girl for a date, when they never really asked.
Don't automatically apologize. Don't make excuses. Don't get defensive. Think about the situation and decide if you want to apologize. You might need to in order to save your job, but in other situations you might not owe the other person an apology.