Boyfriend problems

I'm nearly 14 an I have been with my boyfriend for 1 year and 5 months but we had to fake a break up due to his friends and my boyfriend kept flirting with other girls and mostly with my bestfriend, he was hugging her holding her hand, I don't know what to do we are 'back together' now and he sat next to her in a lesson and someone said to him that I was complaining that he was with her and I wasn't.Hes annoyed with me now.It feels awkward with him what should I do?