Lucas, some days you will wake up depressed, and other days you will wake up - then realize that you haven't even thought of W until like 10:00am or so.
The ups and downs are normal. I had a few days where I just wanted to cry. I had other days where I couldn't have cared less about the sitch; I was having a good time being free and single.
The key is keeping busy, working on improving yourself, and (as hard as it sounds) NOT dwelling on this pickle you have landed in. The only control you have is whether you are IN FOR THE DURATION, or if you are going to bail. If you choose to stay, you also need to choose not to depress. Yes, it is a choice!
There are many books out there which explain this - the best one I found is "Choice Theory".
No matter what happens, Lucas, you will be OK. You will be better than OK.
Me: 54 Her: 50 and sexy as hell M: 32yrs T: 34yrs Bomb: Sept 26-07 "lost our emotional connection" Bomb 2: Dec 25-07 she's "not feeling desire" She asked if she could come home Apr 26-08! Everything's GREAT!