FWIW, London is an incredible, vibrant city and one of my personal favorite places on Earth. Something you might like if you are feeling dread from being in such a dense city is how close it is to the country. A short train ride will take you far outside of the city and there are plenty of places to go that give you that 'small town' feel.

Also, go to Terry's for breakfast in the city.

http://www.terryscafe.co.uk/