Talking is not something introverts like doing. They'd rather listen while nodding. They observe and absorb, but they do not want to be overheard. However, if he's chatting to you about this and that, it's a dead giveaway that the introvert is interested in you and even flirting with you. Introverts usually have a close-knit group of friends. They prefer to rely on a few good friends instead of having many acquaintances. This is because they find it difficult to maintain relationships with so many people at once. However, they will open up to certain people they feel comfortable with. These might be your allies who help the introvert get out of his shell and make him feel less alone. Introverted people are usually good listeners. This makes them good candidates for being an observer on a date or on a blind date. They can watch your body language and know when to talk and when not to. As I said, introverts don't like to talk much, but if there's something they want to say, they will find a way to get it out. So, be careful what you say on a date! Introverts usually have a good idea of how they feel about someone before they even speak to them. If someone doesn't catch their attention after several minutes of quiet observation, then there's no use in continuing the conversation. The introvert needs some time to think things over before talking.