Loneliness is the negative feeling that comes about when your social needs are not met. When you feel lonely, you may find that you experience a heightened sense of vulnerability, and this can take its toll on your mind and your body. For some, the feeling of loneliness can be temporary, but for others, it can be long-term. Loneliness is not a sign of weakness or even fragility. It doesn’t even occur just in the elderly population, or those who are physically isolated. It’s possible to feel lonely, even if you are surrounded by people.