You'll Feel Ambivalence
One day, completely out of the blue, you'll look at your baby and realize that the intense passion you felt just the day before has been replaced by a numb, hollow feeling. Do you know this child? Do you care? You'll feel like bagging this whole dad thing and starting a new life somewhere else. Chances are the very next thing you'll feel is incredible guilt at having had these feelings in the first place. After all, if you aren't head-over-heels in love your child 100% of the time you're not a good father, right? Wrong. Ambivalence is a perfectly normal part of being a dad and you're going to have the same feelings dozens of times over the next 50 years. So get used to it now.