Ooh Mary, thats so exciting! What classes did you sign up for? Are you enrolled in a certain program, or just taking personal interest classes?
I think that as you detach you will feel better, well, I know that you will. Hes the one that makes you sad, so if you dont come into contact with him, you will think of him less, and as you think of him less, your emotional ups and downs will slow down. What I mean is that the less you find yourself immersed in your situation, the less you will think about it.
Oh, and I wanted to suggest a book for you, its called Hope for the Seperated, Wounded Marriages can be Healed, by Gary Chapman.
I guess I gave the wrong finger to the wrong man...