What seems to have happened is that you've realised that spending good quality time with your friends without a care in the world and any sense of work is 'nice'. The reality of living in these places is very different - they are very repetitive, there's little to do and you spend your time surrounded by miserable people who are getting drunk to escape the misery at home. These places are pretty soulless.
I also see the UK-bashing brigade have entered the room, with the usual complaints that the UK is crap, expensive, going to the dogs, rubbish quality of life etc. The reality is actually very different. Houses are expensive (but aren't depreciating in the long-term), but broadly speaking things aren't too pricey by European standards. Compared to Germany, for example, they may well have perfected the art of delivering basic processed food at a bargain price, but good food is just as expensive in, say, Frankfurt as in London. I'd pay more income tax in Germany than in the UK.
Germany is a nice place and has a lot of plus points over the UK, but we should approach these comparisons with a sense of perspective. Another factor often completely overlooked is where you sit on the income scale - your relative quality of life between cities and countries can vary hugely depending on your earnings.