Is it necessary to be socialize to understand dhamma?

If some one is a anti-social person , there is no reason to get angry, to be jealous, to have conciet .... All those problems arise when people socialize. So, Is it necessary to be socialize ? 1. If it is, Why buddha said, go to a forest to meditate ? Get a free and quite time ? 2. If it isn't How do I recognize those thoughts ? (If we have no reason to get those feelings, we might think we haven't those thoughts) 3. Or should I not think about that ? (Being social or not being social is out of my control ?)