It is important to keep in contact with your friends and family members when you are dealing with a breakup. It would be completely wrong to lock yourself up in a room or refuse to interact with people who genuinely care about you and may be concerned about your welfare. When you have officially ended your relationship with another girl, you are free to start dating others. Sometimes this may help to attract her attention or make her want you back in her life. To know how to get your ex girlfriend back, you should not sit around doing nothing. You can use this time to make new friends, spend quality time with family or even take up some hobby which you had always planned on doing.
While you can try to give her the impression that you may have moved on in life, sometimes this may backfire especially if she feels that you do not care about her at all. You need to convey to her that although you are open to dating others, you still have feelings for her and this change in stance may make you appear more mature in her eyes. You need to start becoming friends again to set the communication rolling. Only a close friendship can help you rebuild the trust.