Understand why the failure happen and try to get it back, if we're not able to get it back then nothing to worry there is another love waiting for us. always be cool, positive and try to meet your friends and have a fun with them so that you can get out of dat mood.
Couldn't have said it better. If its failed, then it wasn't real love. So learn from it, and move on! The more you try to retrieve it, the more new love you are blocking to be received!