OmGG ! What Sould I Do .?( Is My Boyfried Cheating ?!) Whats Your Opinion ?

okay so me & my bf have been together for 5months & we argue sometimes . Last time we got in an argument because I found out he asked out another girl & i was on the break of dumping him ! He told me he was sorry & that it would'nt happen again . So today my friend tells me that she seen him with his ex & a few of his friends . ( him & his ex have mutal friends ) but then she tells me that she herd that they had sex together . She doesnt know if its true or not or when it took place ( eaither it was before we got together , or yesterday ) . ! But i honestly dont believe they had sex . iknow what my bf is capeable of , ! i just dont think he went that far , . but then at the same time i really dont know what to think . i didnt have any contact with him , except for his friend that he hags with . so i txted his friend to tell him it was over . he asked y & i told him . He said that my bf was still a virgin . ( Okaiii ??? ) but anyway , i know my bf . & if i wanted to break up , he would do anything to get back with me .i asked him just yesterday wat he would do & he sed he would cry ; . but called me like 10 times today at the crack of dawn . Wats your whole opinionn