I don't think things you did when you were a little child necessarily count as anything... I mean, if it wasn't really romantic or sexual, it could just be something you got the idea to do just because you "liked" that person platonically and thought that's what girls and boys do when they like each other. Or the physical feeling of a kiss might have been nice so you'd innocently do it again. I don't know...

There were a few members of the opposite sex I had some kind of feeling for when I was pre-pubescent, but really that was nothing, it wasn't even romantic, just a sort of... well, I guess the Ace community would probably call them "squishes". When I had my first romantic crush on someone of the same sex (around the age of 13?), it was a lot different. Even then I wouldn't have been in a relationship with that person and it certainly was never sexual, but that was the one that made me question what my sexuality was. It was another couple of years before I was happy to label my orientation (actually based pretty much on that one event and realising I had a romantic bias... I never had another crush again until I was in my 20s) and not until a few years ago did I find the right label...