Most Helpful Girl
Your breakup is still new, sweetie, you are Not done licking your wounds, Nor have you moved on. She Obviously has, or she wouldn't be-------In someone's arms right now. And with feelings so real, it Would 'Bother' you.
All you can do is Consider this your Closure and move on yourself. Of course, you are Only human, you still 'Love' her. Maybe you need More time to get over her, perhaps it will not be for a very long time. And anyone even a month from now, could end up a "Rebound Rebecca."
If you feel there is never any way of you both reuniting, then keep to yourself for awhile and don't try to even contact her. It will be better for you to begin your beguine like this.
Good luck. xx