What should i do and what is going on?

My boyfriend recently dumped me coz he made a bet with his friend tht on his mates bday they will both b single so he broke up wit me day before his mates bday n nw i ave a feeling he dnt wnt me bak coz whn i went 2 drop off his mates bday card he didnt cme out to say hi to me only his mate came out. can any guys be of ne help n gals wat wud u do? we have been dating for 3months nw n he means so much 2 me n dnt wana lose him wat shall i do???