I was in a relationship at the same age for around a year and it went from him being jealous over small things like spending time with male friends and texting them to the point where he wouldn ' t allow me to speak or have any interaction with males even in class or work or anything . It went from small jealousy to severe with abuse quickly . But there difference here is that you recognize it . He didn ' t . To deal with jealousy , you have to accept that she loves you and because she loves you she won ' t cheat on you . She may have male friends , but that doesn ' t mean she ' s cheating . Trust is 100 % key here . If you know and trust that she won ' t hurt you then you have nothing to worry about and therefore the jealousy will go away . You have to build the relationship on trust .