There's a massive difference between being alone and being lonely. You can be lonely in a crowd. As some other posters have said some of the loneliest people out there are the biggest attention seekers - makes sense really. I don't know if I'd go as far as to say that was pathetic, but I do feel sorry for someone who feels they need affirmation and attention from other people to make them feel worthwhile.
A few years ago, my other half had to go away over Christmas due to some family stuff. I couldn't go because I had work commitments, so that meant I'd be alone for a few days, but that didn't bother me at all. What did bug me was our friends and neighbours assuming that I'd be lonely and insisting that I go round to their houses to spend the day with them. Some of them got offended when I declined politely. I'm usually quite a private person and pretty self-sufficient. I really enjoy my alone time, reading or listening to music and had planned to do exactly that, slob out on a beanbag in front of the fire with a good book, no TV and the music on random play.