How to get your boyfriend back !?

Okey so me and my boyfriend was datting since decemeber and i love him like crazt he is my everything and i would never ever hurt him just yesturday he text me and was like he cant talk to me nomore (We are teenagers) Because he when we first ment he was talking to some other girl lets just call her (sammie) and he was like he cant keep telling me he dont go with her beacsue he do and he love her and me to . i still love him and and when i talked to his brother he told me that he feel stupid and bad . i reall want him back what should i do