However, loneliness is not the same as being alone. You could be in a crowded room and feel as if you're invisible or unable to make an emotional connection with someone else. The emptiness that you feel is caused by not having as much social interaction or intimacy as you would want.
Everyone experiences loneliness at some time in their lives. To combat it, you might try volunteering (Volunteering at Catholic Health), which can increase your self-esteem and introduce you to people whom you otherwise wouldn't have the opportunity to meet.
If you're feeling lonely, try out the following strategies recommended by Psychology Today.