Sexual Abuse: Do I have a Case?

When I was about 15 a women use to sexually abuse and molest me all the way up til the age of 19, she would pay for hotels and stuff and blackmail me if I did not go along.

I am now 20 and she is 23.

is this a matter to take the police and will they do anything about it or just ignore it.

I am talking in regards to criminal not a civil case.