As an experienced patient of clinical depression and a recent heartbreak of my own I would suggest that you do not spend any time self isolationg. Here is a list of what you need to do.

1. Have no contact with this guy
2. When you are either on the phone with a supportive person or have the company of a friend put every single thing that reminds you of him in a closet somewhere.
3. Start a journal about your feelings from day to day
4. Keep yourself busy making plans with friends or a new guy...just go out and have some fun and enjoy your new freedom
5. Make plans for a month from now, plan a exciting trip or an outing
6. Try to forgive him if you can and wish the best for him...be the stronger better person and he will regret his mistake
7. Try to join a support group, this is something new I have tried and it really helps to vent to a group of people rather than just a T.

And always know that I am here for you as well as the rest of the group here at psych central.

Much love to you and Happy Holidays. Trust me, you will become a stronger person from this...take a moment and feel that strength.