If you’ve already told yourself that your date is not going to like you, will not find you attractive or you won’t have anything in common with you, it might be best to cancel. Going into a date with a bad attitude is not going to get you a second date. All you’re going to get is an annoyed person sitting across the dinner table from you and a feeling of awkwardness when you realize that going ahead with this date was a bad idea given your current pessimistic state of mind.