Yes, definitely a very important message. I'm a strong believer in this.
During my teens, I was the only person in my group who didn't have a bf etc. which eventually led to me being significantly depressed with low self esteem etc. It also meant that I made some bad choices with one night stands where I was being totally used by men, just in the hope that I'd get a boyfriend out of it :(
Anyway, the problem got worse when I went to uni, as I expected a much more even spread of single people, and potential single men, but in fact everyone I met and lived with were all in serious (ish for 18/19 yr olds) relationships! It was at the end of my first year at uni when things were really bad, and then I started rediscovering 'lost' interests from late childhood - you know, things you were interested in at 10/11 (in my case reading, history, playing the piano etc) but then a lot of teenagers drop in favour of all night parties, brainlessness and drinking.
I started to build this really rich, interesting life for myself, and made the most of the friends and family I had rather than being miserable about what I didn't have, and I became such a strong, independant woman. It actually meant that 4 years later when I finished uni, I met my now DH, but knew how to spot a man who would respect me and I knew myself well enough to be my own person in a relationship - I don't think DH and I would have the relationship we do (if at all) if I hadn't been so comfortable on my own. It also means, that although if anything happened to DH it would be the worst thing in the world, I know deep down, that eventually I would probably be ok - it's an absolutely horrible thought but almost a bit strengthening to know.
Sorry, this has turned in to a bit of a long story - I've never written that down before like that, but it was the absolute turning point of my life!