i kissed another guy, did i cheat?

my bf(20m) and i(20f) are in ldr. he’s literally in different continent. in the first month it was okay, but later i overheard him telling his roommate that i’m just his ‘friend’ which broke me. i confronted him and he lied saying “oh no, my roommate knows” and blah blah, he then acted as if someone behind him is saying something and then purposely said, “no, i’m talking to my gf rn”. which i for sure knew no one was behind him, no one asked him anything, he was alone and he just lied again. days later this thing kept bothering me and he didn’t give a single fuck, i asked him again and he said that other friends of him doesn’t know but his roommate does. which always for sure is a lie, NO ONE KNEW, neither his friends (girl/boy both) nor his roommate. he pretended to be single the entire time. it was too much for me because he never texted or called me, it was only me, trying to stay connected or trying to work things out. we drifted apart, we didn’t talks for few days and he didn’t care. we weren’t officially ‘broken up’ but it was kinda obvious what was going on. he was busy with his new friend group and whatever, one day we decided to take a break because it was going like a disaster. that day, i knew what’s going on w him and i was too scared to get hurt. i went out w a guy and i had talked to him for few weeks and kinda knew him before than that, we went for a walk after having food, and there where it went a little off board, we were kinda close and we kissed, it meant nothing to me and i didn’t feel anything either. we pulled apart and i was awkward, i told him i’m not over my ex and i can’t do anything as such. that kiss was a mistake, i felt like an extremely terrible person who cheated and all. i didn’t know what to say to my on a break bf. after few days,i talked to him(bf) to clear things out what he wants to do,he told me bluntly that yes he lied and he didn’t tell anyone about us, he said it’s because he’s not comfortable telling people he’s in a relationship and said some bullshit about, “yes i lied so that you don’t get hurt” blah blah. i friend a begged him to act right. he refused that he doesn’t have time for relationship rn. and i said i wanna breakup and i’m unable to do it while sobbing and he only said “okay, it’s fine”. i hung up the call and blocked him from everywhere. few weeks later we talked again he said he wanted to be w me and all, and that we should continue. but I HAVENT TOLD HIM ABOUT THE KISS YET. but one more thing, i saw a picture of him in one of his friends story where he was standing extremely close to a girl(so close even their nose were against each other and he was staring at her lips). it was a group picture few days before i cried in front of him to clear things out, he’s saying the picture was in a bad angle. what’s going on???????