When you have made a decision for a vision and living all in for it, it may look stupid to others but it still not stupider than without having one. And you can't help being so occupied and no space for feeling loneliness in any moment even when you are alone in your own world. People can disturb you in any forms but it cannot rob away your joy and focus. Loneliness never occurs because of environment, it is pre-occupied when you are vacuum on the inside, hence it also permitted insecurity making room.