It's the same thing as her telling you she has feelings for someone else or another girl. Don't get caught up in the fact that she wants a guy over you, really that's not the issue! So that being said time to move on!
Best Approaches for me include: Doing something fun just for me. Like a mini vacation or a trip to the day spa, or even a new haircut or a shopping spree! Then I like to take up a hobby or retake up an old hobby that I just haven't had time for. One good thing about a break up is you have more time for yourself! Instead of being unhappy about it use it wisely. I will also surround myself with my friends and family members when I am going through a rough patch. I also suggest when you are ready to join a club, group or organization: gym sports activity group, etc! Its a great way to meet new people with similar interests as you. And sometimes this step is super important if you have been in a long term relationship and share the same friends!