No porn addiction but thinking about sex HELP

Im on day 13 of being abstence of orgasm. Its been a month i have seen porn and really i dont have urges to watch porn.. but as i do feel better i feel the need to realse my semen.. i try to study and i keep thinking about having sex with this girl... the reason why I hold myself of doing it is because I dont love her and dont want to waste my time/power/energy to her.. i hope you do understand... can someone help me.. its hell and im on day 13 of doing monk mode nofap.