Infatuation can be like trying to hurry along the growth process. A child is not an adult even if a child wears grown up clothes. First of all, love and anger aren't opposites. They operate on two different planes. Anger, happiness, joy, warmth, pain, anxiety, and many other feelings can all occur within an overriding context of love.
Love is like a house composed of many rooms called feelings.
Standing in one room doesn't mean the other rooms don't exist, nor does it destroy the broader concept of house. In fact, if we really have an open and free relationship, one where we can move freely from room to room, it is impossible not to occasionally find ourselves standing in the room called anger. Because people do differ, we eventually discover areas that will come into conflict. Even though we care very much about one another, anger is a very healthy part of a love relationship because it suggests a good deal of openness. The important issue is not whether or not we will be angry with our partner, but rather how we will express that anger and resolve our differences.