Parts of you can stay being a teenager forever. I'm still seventeen in my head at times, and that's fine. Though actually I may have progressed to 21 lately. 21 with eight years of experience so I can masquerade as an adult a large proportion of the time, and be fairly independent.

In all seriousness, and without patronizing you - you are really very young still. 22 is nothing. Your brain hasn't even stopped maturing yet. The world we live in encourages a prolonged adolescence, with university meaning most people are only emerging out of full time education in their twenties, so embrace your youth. The average age for buying a house in the UK is now 37 compared to 24 fifteen years ago. Times have changed.

I also think that people who never have a bit of youthful frivolity during their teens/ early twenties, who keep it all very tightly wound in terms of school/uni/marriage/kids quite quickly and everything done very sensibly - they tend to want to rediscover some of the teen stuff when they hit about 45. They feel they've missed out.