I'm also from the UK and I felt exactly as you did, at exactly your age.
As others have said, travel. Specifically, stay at youth hostels; you will meet and get to know many wonderful people from all over the world.
When you stay at a hostel, people will tell you of new and fun places to go, where you'll meet more new and interesting people, and the virtuous circle begins.
At 25 I left my contracting job and spent 4 summer months travelling Europe.
As others have said, travel. Specifically, stay at youth hostels; you will meet and get to know many wonderful people from all over the world.
When you stay at a hostel, people will tell you of new and fun places to go, where you'll meet more new and interesting people, and the virtuous circle begins.
At 25 I left my contracting job and spent 4 summer months travelling Europe.
Perhaps my favourite destination -
http://www.lakecomohostel.com/