texting meaning another thing?

Aleesea Rose • hard to choose between food and my boyfriend (;
so my boyfriend took me to his house just to watch a movie and cuddle, he went upstairs to change his clothes because he wanted to go out to eat, and he left his phone on the couch. He gave me his passcode so I went through his phone, AND HE WAS TEXTING MY BESTFRIEND. and she didn't even tell me that they were texting each other. and I asked him why was he texting her, and he said because I would take to long to reply.. I TAKE LIKE TWO MINUTES. then he later spit up that he, HIMSELF, asked for her number, and again, she didn't even tell me... I told him I didn't like it, and he got mad at ME and said "it's nothing". but , he blocked her number anyway. Was it really nothing? or was something up?