Here are some tips that might help you getting your girlfriend back.
With no doubt is going to be tough for you, but I’m going to suggest something counter-intuitive: leave her alone! Give her some time to herself. You never know, she might well realize that she misses you and agrees to start up the relationship again all on her own. Don’t dismiss this possibility, even if all looks lost right now, equally don’t cling to it as a possibility. If it happens it happens, if it doesn’t it doesn’t!
However, if what you need to get girlfriend back is a much more direct and hands on approach then again, take some time out and use that time to get your head straight. By default, you give her some time to think also and put the whole thing into much needed perspective.
So, find your friends and spend time with them. Make sure you are not pestering her with emails and texts and accidentally trying to bump into her in the places where you know she hangs out. This will only back fire on you and ruin your chances of getting her back, because she’ll only become annoyed with you.
If you neglected her, missed her birthday, hardly ever took her out, then you need to seriously look at that behavior. No girl worth her salt is going to put up with such behavior. A girl wants and needs, to be taken out and made a fuss of. She needs to know that you want to be with her for more than the obvious. If you fail to show her that, then she will walk and find a guy who can show her that.
If all that you did was hang around with your friends and ignored her wishes, then again, you’re going to have to understand that this is not the way to treat a girl. If you’re sure that you want a girlfriend then it’s time to fix up, look good and look sharp! Start acting like she’s important to you.
To get girlfriend back you now need to show her that you have understood her needs and you are ready and prepared to meet those needs. Don’t mess up and try and get her back under false pretenses. It won’t work for long and maybe when she leaves the next time, she’ll be gone for good.