Is your ex boyfriend seeing someone else? Did you see him out with someone and suddenly realize that you really want to get him back? Are you afraid it's impossible and that he's moved on? If you are really concentrating on how to get a boyfriend back, it can make you have tunnel vision.
You can't think of much else besides wanting to get him away from the other woman.
Seeing him with someone else awakens the territorial feelings inside you, and you begin to think of everything that you loved about him and your relationship.
But see, the rebound relationship can actually work in your favor when you are figuring out how to get a boyfriend back.
First, if he has moved on so quickly it is probably because he can't stand to be alone because he can't stop thinking about you.
So he figures if he tries to move on it will get the thoughts out of his head.
Second, even if he is trying to move on so that he can stop being in love with you, being with someone else is only going to remind him of you.
He will constantly compare her to you, and since you know you are better, it is only a matter of time before he has to dump her because she isn't you.
While he is dating another girl, now is the best time to concentrate on getting him back.
Keep things light and casual, and don't forget that you have a life too.
You don't want him to think you are available, just sitting around waiting for him to want you back.
Instead, you need to have your own life and never let him see you as desperate.
If you run into him, keep your interactions short and sweet.
Don't ask him too much about his private life and his new girl, and don't let him question what you are up to either.
Be aloof and busy, and never call him back immediately if he calls you.
This is critical, because it will drive him crazy that he won't know what you are doing!