Is this cheating?

Let's just say last year in April, i was talking and seeing a guy. We were a 'thing' but we didn't exactly have a label b/c we weren't official. But we obviously liked each other a lot and we were just in that talking stage -- the stage before you become boyfriend & girlfriend. But while i was "talking" to the guy, i began seeing another guy at the same time. they don't know each other (they still don't know that i was with both) and we began having feelings for each other as well... and doing stuff together. i was basically seeing 2 guys at the same time without their acknowledgment. i've been reflecting on this for a while...was this cheating? i mean, i wasn't in a official relationship or anything with either but i did have some sort of relationship with both. its weird.