She dumped you for a reason, and it probably wasn’t because your relationship was going really well.
It’s normal to want what you can’t have, and to be attracted to someone who rejects you. (In other Men’s Fitness columns, I show how these principles can be used to your advantage when meeting and attracting women.). In addition, your girlfriend probably occupied a big role in your life. It’s normal to miss her presence during those now-empty spaces in your day. But none of this means she’s the right person for you.
Before you try to get her back, read the classic Love Systems article “Kill Beatrice”. If you made it to the end and still want to rekindle your relationship, then read on.