Sexually hurt when I was 8 by my 13 yr old cousin. TRIGGERING

Was this illegal?

He made me put my mouth on him multiple times and he attempted to penetrate but could not figure it out thank goodness. He said he would tell my grandpa that I asked where babies came from, that mortified me. Sorry if this is triggering for some.

Is what he did to me considered sexual assault, sexual abuse, or rape?