This is a tough call. i agree with you on telling her. i recently told my wife of two years and she was cool with everything, she was more upset that i kept it hidden. my keeping it secret definitely caused a rift in our relationship. since telling her we have never been stronger. some questions you need ask yourself i think are how serious your dressing is and only you can know how she will take it, is it worth it ?. for me it certainly was. as said before my relationship is stronger now because i told her.