jealous

Hi! I'm jenny, 14 and i'm from rome. i download the app "MeetMe", to meet some other peoples. Until i find HIM! He ask my number for whatsapp, then we texted everyday, until he ask me to be his GIRLFRIEND. i was so happy, when he ask that question. I say YES to him. he change his status from facebook to whatsapp, he write "Jenny is my life, she is very important to me". our LOVE was PERFECT. He considered me as his PRINCESS. we love each other so much! until that one day, the most painful day ever i had in my life, I saw his status, that he write one name in my name place. I started to cried, then i called him and ask 'how could you do this to me? i trust you all day.. whyy? did i missed something?" then he say only "SORRY". until i make my desicion to "let him go". then after 4 months, can't still move on from him, i still love him like i do. i want to kiss his cheeks and lips and hug him so tight, but i can't. we're so far from each other. the big question is "WHAT SHOULD I DO?"