Man's search for Happiness

Is happiness related to Meaning? A Man may find about the meaning or purpose in his life; but would that give him or her meaning. Was people who find real value in their life like Mother Teresa and Nelson Mandela necessarily happy?

On the other hand, do men who search and find cheap thrills necessarily happy?

Many are terribly afraid of the silence. As in silence, these questions start to rise? And it is better to be immersed in noise to escape thinking or answering these.

Can you be happy being alone, living just in your mind?