I loaned 3000 to a friend who was to pay me back. she has refused and no payments made. am I able to take her to court kto retrieve my money?

I'm  not sure I understand your question.  Why wouldn't you be able to sue her for breach of your contract to repay the loan?  Thats' what courts are for.  Of course, there's no guarantee that you'll win.  She might claim that the money was supposed to be a gift, that she has already repaid you, that you caused the dental damage in the first place and so were responsible for payment, or some other defense, but you absolutely can sue.