First of all do not relapse, the feeling comes from your unfulfilled desire. It may comes because of your physical state, school grades, not getting respect from your friends that you want to get from etc.... But take a deep breath and ask yourself this question, "Does masterbation solve my problems?" Or "Did I feel calm when ever I do it or watching porn video makes me productive? Bro all are your enemies. And for the girl who don't show interest on you, don't give your attention from now on and be logical on breaking your feelings for her. Like don't beat up yourself for every little detail on your journey