Is this serious or minor molestation?

So, I was molested as a child, a young age in fact.
Realistically, 6 or 7 years old.
The act were dreadful, or in your opinion, foolish.
I was rather stupid to not say anything, to keep it quiet and it keep it hidden for as many years; it has been 7/8 years now.
So does this count as sexual harassment or...?
It was my cousin who actually...molested me.
He, uh, erm, fingered me (age/s stated above).
And no, it was not pleasant, it was unpleasant and very uncomfortable.
And he was 14/15 years old. Mean anything?
This act which had happened to me is revolting and I am in disgust.
I feel impure, and yes I did want to kill myself, I received suicidal thoughts.
I wanted to overdose myself, and I did but regretted it and spat it out.
I cannot even sleep, it keeps swirling back in my memories, flushing my mind with utter abhorrence.
I kept crying for endless days, that I maybe perceived as a 'slut.'
Yet I still do cry, but away from everyone; this is sometimes, not all the time.
I'm 14 now.
My parents and sisters do not know of this, only brothers, but I feel as if i'm hiding a great lie from them.
What do I do?