May i just suggest a small piece of advice - clear your life of any belongings related to her, even your wedding ring, these material things will serve as nothing but reminders and are no longer of any positive sentimental value. If you decide to keep anything let it be things that are related to the kids and let them have it, for me cleansing myself of all the marital items was a decision im glad i made, these items become obstacles on your healing journey and path. Think of it as closing a book of your life and prepare yourself to start writing the beginning of the second edition of your life. I know this is cliche and it felt as such even when my therapist regularly said this, but the new positive memories will come when you are ready for them, and remember there will come a day when you will have an authentic and genuine smile on your face, then you will know you are on the right path.