Is this a Sexual Assault ?

I know the question itself might sound stupid but I just didn’t know how else to phrase it...

I (23F) kept remembering one specific event from when I was seven or so. I had an older cousin, 4 or 5 years older than me. One day, he asked me to follow him. I adored and idolized him, so I did. We ended up behind a large tree in the back of our grandparents backyard. No one could see us there. He looked at me and said ‘’I want to try something’’ and he kissed me. Not a smooch, full blown french kiss... Again, I was 7/8, and he was 11/12. I remember the utter shock, the extent to which I absolutely didn’t understand what was going on.

For years, I kept asking myself if it was a memory or a dream (which made me feel insanely guilty cause I thought it was horrible to be capable of ‘’inventing’’ such scenarios). I ended up asking my mom (who was there that day). She told me it 100% happened. That I ran out of behind the tree and came to her. Apparently I was ‘’happy’’. At that age, I really looked up to that guy and he had some kind of power over me. So basically, I ran to my mom, all smiles and said ‘’[cousin’s name] kissed me ! We’re gonna get married’’

Since I looked ‘’happy’’/’’not traumatized’’, they just told me it was not ok and apparently, they scolded my cousin.

I have been through alot of other abusive situations since then, and now have complex PTSD among other things.

I have no memory of SA but can’t be a 100% sure it never happened throughout my childhood. Anyway, I never know if this memory in particular can be called ‘’abuse’’ or not and I guess I needed to share it...