When making a new life for yourself it can be quite useful to make some new friends, whether this means joining a new group or club, taking up a new hobby or just frequenting a new bar. By no means does this imply that you should immediately abandon all of your old mates; quite the opposite in fact; these people always have been and always will be a very important part of your life (although I could've done without the unexpected 'chummy' texts from my ex 9 months after he left), it simply means that you will now have a brand new group of pals who have only ever known you as 'you' and not as part of a couple. A few months ago, I'd have gladly stuck rusty nails in my eyes rather than join a gym class, but join I did and in all honesty it's completely changed my attitude.
Meeting fabulous new people can lead to a variety of different and exciting experiences, including visiting places you'd never actually been before, trying out new pastimes and exploring ideas and concepts you never thought possible. It also inevitably leads onto making even more new friends, which can only be a good thing. Highly recommended for anyone trying to start afresh.