Should I stay with my boyfriend or not?

Im 14. Me and my boyfriend dated for 11 months then he broke up with my because he liked another girl and wouldnt talk to me. When I tried talking to him he put me down got mad at me called me annoying and everything. He apoligized a week later saying we should stay best friends so we did. Then his mom did a photoshoot party for my birthday and went home and showed him pictures. He texted me later that night saying breaking up with me was a mistake and we got back together the next day. He told me strictly to not tell anyone and wouldnt tell me why. 5 days later he dumped me again saying he just wants to be single. Then to find out while his parents were at a trivia thing with his friends parents they went walking and found 2 girls walking. His friend made him get the blonde girls number. He told her they werent going to date from the beggining. then last saturday exactly a month from when we broke up he called me saying sorry, he loves me, it was all a mistake, he did it thinking being single would be good but turned out he needs me. He asked me out and i said idk when i did he sounded like he was going to cry because he was so upset. finally i said yes but the girl he gots number (Aly) and other girls like her friend and just girls from school(he doesnt go to my school) are constantly chatting/messaging him on facebook and texting him and he answers. I trust he wont cheat on me but im scared that hes going to hurt me again and like someone else or something. He said he wont and he told me hes never breaking up with me again and that im his girl but idk im just scared. when i mention it to him he says "oh so u dont trust me" and gets mad. Im just so scared because im so hurt. I told him idk if i can do this yesterday and he replied saying "No Anna were perfect i gtg love you baby girl :)" he avoids talking about it. We met June 7th 2010 and started dating June 9th 2010 and lasted 11 months and are back on. He was my first kiss, hug, hold hands, arm around, and just everything. He's a great guy sweet and everything but i just dont know. Im so scared but i still love him and have this whole time.. Am I doing the right thing or what would you do?? Please Help!! :(