What do i do about him?

my boyfriend was being rilly nice to me in the begginning of the relationship then he started changin on me a week later and i really dont know why. he starts bitchen about everything. his attiude sucks badly. da way hiz attitude is you wuhd swear hes a ***** on its period. he breaks up with me like erry other day on sum dum shxt. he got mad because ididnt text him friday imean he was getting ready to go to prom and he said he was buizi had to get hiz hair done an such and then itoll hym swrry thought he was buizi den he said you know what idon kare bye! he broke up with me today!