Is it time to break up??

ok so my brother changed my myspace and it had been like that for like 4 days before my friend said something to me about it and i wasn't at home so i had her change it back then i text my boyfriend asking him if he saw it, when he texted back i then had to explain what he changed it to and so forth well he didn't believe me that i didn't do it and there was a huge argument so he's like i dont wanna talk abt it im goin to bed so me and his sis r talkn (he didn't really go to bed) and he read the texts and she told me he believed me he started txtn again but nvr said i love you...now today he was being kinda weird but then he said something sweet but then out of no where he was like whats ur prob so then after i replied he was like idt we shuld talk rite now and he said bak to my reply im busy (and he's havn a party i culdn't go to bc im out of town and theres a girl there he used to like so i think he mite b cheatn) so we stopped talkn and nothing from him since like 1pm, what do i do?