does this count as sexual abuse?

I was about 5/6 and i would be in my mums salon when I didn't have school/nursery. My mum's colleague would take me to the back where the lockers where and then he convinced me that it was normal for me to make out with him. He said that all girls did it and that i shouldnt tell anyone especially not my mum because then I'd be in trouble. Im extremely ashamed to say this but I agreed and just, carried on and let him make out with him.

(10 years later, I just found out i wasn't the only victim and he had done much worse to other people but he never got to do anymore because i moved country)

I wanted to know if its child sexual abuse because I was very young and although i didn't know it was right I let him kiss me thus it wasn't by force, so is this child sexual abuse or just, nothing?

I'm just curious, its been stuck on my mind for a while now.

thanks