WHEN U HAVE 2 LOVERS BUT CAN'T CHOOSE 1..!!

hi everyone, i am new here and i just have a problem which i like to share with u, and see if someone can help me with some advice please. i am a 17 year old girl, i have been going out with my boyfriend [justin] for nearly a year, then all of a sudden i started fancying another guy! i left my boyfriend 4 this other guy [george]. i fancied george and i like him immeadtely.. justin still came by to see how i was and phone me everyday and told me that he wanted me back and that he still loved me. . then in the weekend george phoned me but i was asleep and so i didn't answer and he didn't leave me a message...and in the evening he didn't call again nor sms me. then justin called me to see how i was and asked me if i was going out that night and i told him no! after a couple of minute justin phoned me again and told me ''i saw george out with his friends tonight and he was in the disco..'' and i was furious! [george was out with his friends while i was at home!!] so when justin asked me again ''r u going out 2nite? [although i was still waiting for george to call me he didn't call] then justin said ''want me to come pick u up and we'go out 2gether?? and i said ''yes, ok'' and that nite i went out with him.. i saw george and he didn't talk to me.. [he and justin don't talk to each other now, they fight over me] then wheni was home in bed i recieved an sms from george and he told me ''u should have told me that u r still going out with justin'' but i wasn't to blame. . he din't sms me!! but then after a couple of days george started smsing me again and he told me that he fancies me very much and he wants me to go out with him!! i really fancy him and i want him but i don't like his character much because he told some secrets i had told him to his colleuges [justin and george work together] and then he went to show the sms that i sent him to justin.. then justin came by to our house and we fought and i know i was to blame!!! justin said ''i love u, never loved anyone more than u, i would do anything for u, i forgive u 4 everything'' and he told me ''i will give u one last chance, ok. it's me or george?!!! u can't have us both" and i told him that i'll think about it!! well, i still have feelings for justin but i don't fancy him that much.. i really fancy george but he didn't treat me well that much.. george met me yesterday and he told me ''i still wanna go out with u , i care about u, i want u'' and that has made me want him even more.. but he told me, u have to leave ur boyfriend first and a little time to pass and i'll arrange with u...
i really don't know what to do.. i am really lost and confused . . .please help me!!! justin loves me so much, i only wish i still fancy him but i don't [ i mean that much] but i have feelings for him too... george, well, i really fancy him like mad, he is so cute, he says he wants me, but i am doubting things about him cos' he didn't treat me so well, i think by showing my sms to justin, and by telling his collegues some secrets i had told him. [justin is 18, george is 21] i don't know what to do, whom to choose?! pls help?!!