There are a lot of psychological studies that are conducted regarding the post breakup mindset, and there is a pretty good chance that these studies have revealed some choice tidbits about what you can do to navigate these churning waters and come out the other side with your sanity intact. The period directly following breaking up with a girlfriend can be tumultuous to say the least, so it is extremely important that you keep yourself as occupied as possible.
The truth of the situation is that it can often be challenging to figure out if you are over your ex-girlfriend or not. This is because of the fact that some of the feelings that you experienced will always be there, but suffice it to say that they will recede if you give them enough time. A great way to know if you are finally over your ex in a complete and unequivocal fashion is you not experiencing any twinges of remorse or regret when you think about them. You will initially feel a twang in your heart whenever they cross your mind, so the moment this ceases to occur likely represents a turning point in your life.
If you want to speed up the process by which you can move past your ex lover, we would recommend putting yourself out there. The fact of the matter is that it can be hard to think about an ex when you have someone new and arguably better in your life. If all else fails, just try to find yourself a distraction that you can use to keep your mind from wandering to your ex time and time again.