There are various ways to try to get your ex back and it's very right too that you would want your ex back, but you have to go about it tactfully rather than clumsily or you will squash all chances of your ex coming back to you..
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Make one final approach- Meet up with your ex this one time to make amends and get back together.
But be mature about the whole approach and do not break down or create a scene.
If you do this your ex will become more difficult with you.
But in spite of everything if your ex is still being difficult then wish them goodbye.
Remain off screen- Make yourself scarce after this.
Do not show up in places where your ex is likely to be.
Avoid your common group and friends where your ex hangs around and make no phone calls either.
Let your ex wonder as to where and how you are.
Let your ex dig out information about you.
Pursue new hobbies- Take up one of those hobbies or games, or interests that you were passionate about.
Enjoy these pursuits to your heart's content and let slip the information about your new found joys.
This information would actually be for the ears of your ex.
Take no notice- After all this your ex is bound to get in touch and tell you they're missing you.
Do not melt at the mere mention of this.
Give your ex the feeling that you've just been polite listening to them but are not affected by what has been spoken.
The moment you relent they will again be difficult to get.
Play this game with care by giving them the impression that you no longer are interested in getting them back.
Eventually they will be begging you to get back to them.