Is he cheating? or r they really just friends?

Okay well here's the story I've been dating my bf for a year now(im14 he's 13) nd I wanted him to call me nd he was like no nd I was like y nd he was like bcus I'm to lazy nd I don't wanna talk about sex (we were txting about sex for like 2 seconds) then this girl I don't like post late nite convo heart nd I just had a feeling it was my bf soo I looked in his fone he was on the fone wit her for a hour nd a half!......soo I told him nd he was like no nd I txted him yes nd he was like ur on crack nd nd I was like I saw it in ur fone nd he was like w.e idc I'm done wit u nd single.....then I was like w.e ill get my **** 2morrow from ur house bye :( then he put a sad face nd I was like y sad face he was like cus I still love u nd he was like I no ur sad u can call me if u want soo I did we kinda talked nd he said he would wait till I fall asleep to hang up.....then the next morning I got my stuff nd he walked away nd I was like u don't wanna talk nd he came nd sat down next to me....nd I was like y did u try to hide it from me he was like cus I no u don't like her nd would get mad but were just friends I promise nd I'm srry nd ill only call u at nite nd I'm really srry babe nd I was like nd u sure ur not gonna hide anything els from me nd he was like yes then I was like okay I kinda trust u but u have to gain it back. Sooo do u think they really were just talking as friends or is he cheating.