You want him back but now hes with somebody new, whats a girl to do? First you need to examine why you suddenly want him back. Is it just because hes moved on? If so, back off and move on yourself. Wanting somebody you can no longer have is unhealthy. Wanting somebody because you once had them and now they are with somebody else is just plain selfish and mean. If you really loved him youd want him to be happy with or without you. If competitiveness is not your motive then you are stepping in something much more complex, and be warned that it wont be an easy time trying to rekindle romance when hes trying to start anew. Do you want him back because you miss him and know you made a mistake? Does he send out signals that he misses you too despite his new relationship? The right and wrong factor gets blurred when you know he still has feelings for you and that he is using the new relationship to get over you. It is unfair for him to use another person to let go of his feelings for you. It is unfair to him, it is unfair to her and it is unfair to you. The only time it is OK to mess with a new relationship is when you know it is a sham, a part of a game, and/or a mistake. This is a hard call to make. After all how can you ever know what is really in another persons heart? There is only one way to know, you have to ask. Contact him, put your heart on the line and ask. He may not be truthful but you absolutely must go with what he says and not what you feel. If he admits to having feelings for you move forward with our Win Him Back Tips, if he tells you hes let go then you must do the same.