There are no words for this....
Honestly I don't even know what to say to you, people are saying 'tell the police' but I dont think they would do anything. You say she touched your breasts etc, but did she actually do anything explicitly sexual? Because unfortunately, female rapists are not even taken seriously, according to the law you can only rape someone if you have a penis.. which is complete bull****, but if she didn't do anything explicity sexual other than put her hands on you in a sexual way, the police are not even going to take this seriously, especially since it was over a decade ago and no direct sexual contact actualy happened.
I cant even imagine being in this situation but you should get away from her as soon as you can... do you have any small siblings??