Some people are more sociable, and they find it difficult not to interact with their surroundings. Still, recognize that when you are on a date it is all about one person. It is not appropriate for you to engage with the waiter, the old friend you bumped into, or some random person walking by. As the dating progresses, it becomes less of an issue. But even then, make sure to include your date. When dating, you should never hold a conversation that your date is not a part of.