Do not be alone
Go out with someone else either your friend or a new girl you know can make you forget about your previous relationship and your ex. Go and have fun. Forget about your ex. Being alone will make you feel sad and keep on reminiscing your keepsake with your ex.
Don’t agree to befriend with your ex
It sounds good to befriend with your ex after you both breaking up. But actually, it is backfired. Befriend with your ex is the biggest mistake you would do. Try to be as far as you could from your ex. If you still stay close with your ex, the probability you will be sad over and over again is bright. You will be sad when you have found out that he/she has a new partner, flirting with someone else etc. Befriend with your ex is actually you keep a high hope to be with him/her back. Trust me, the best thing you should do is just let him/her go. Stop hoping anything from him/her. There is no use for you both to befriend without strong reason.
Here comes the pain
Just let the pain conquer you for a while. Let yourself crying. It is not wrong if you sad. Everybody will feel the same thing after breaking up. Do not keep the sadness. Just let it away. In the other words, do not refrain yourself from crying. If you want to cry, just go ahead. Amazon.com Widgets