Omg some1 help me!!! been cryin my eyes out..?

ok so i was goin out with this lad clld steviee nd today he coms up 2 me nd says "sorry katie bt i dnt luv u im goin out wit sarah now" sarahs mybest mayte she knew how muchi liked him so WHY??!!!!! is she now going out with him??? i dnt get it btw i am 14 and me and stevie were gettin quite serious he seemd 2 rlly like me!!! so why has he betrayed me!!! nd why has my best mayte stabbd me in tha bak??!! some1 help me!!!! i need advice and FAST wot shld i do??!!! thank u ppl who answer!!!! xxluv u all lotz..xx. <3 katie <3