You're single. This is the best time for you to focus on you. Now, your money and time is all yours to take. Don't feel guilty about spending it.
Go to a spa and get pampered. Buy a new set of clothes, shoes, and makeup. Give yourself a makeover as the strong, independent woman you are. Enroll in a culinary course and learn something new. Indulge in worthwhile activities like yoga, swimming, biking, and the arts.
As you improve yourself, you'll build the self-confidence that was marred by your previous relationship. Being confident in yourself gives you a certain balance. It makes you feel good about yourself, and that's very attractive.
It also helps to have a role model or mentor, someone who you admire as a person. This could be someone who's also gone through a breakup and can give you some guidance as you're dealing with your feelings. Don't be afraid to ask for help if you need it.