I know exactly how you feel and I also know that we can not do anything to "fix" it or make the time pass faster.
Divorce is not important. In my situation it has never even been mentioned. Because my W is living as if divorce is just a frame of mind and it really is. The piece of paper means nothing, I have been divorced for months I just didn't know it yet.
My W is now in a "relationship" she started 3 months after she moved out. So I guess what I'm saying is just take it day by day and don't view divorce as being the "end" it's just another stage. And like in most cases divorce changes nothing, we will still need to see our W's forever.
The best advice I can give and I'm no expert is just make yourself the best person you can. I know you would have heard it 100 times before and it's little comfort to us that are left to dwell on the past but seriously hanging on to hope and wanting my W was killing me slowly and I needed it to stop.
I have now made my peace with the fact she has moved on and is right now happy. Now I am working on myself to be in the same position.
Life is short, put all your energy into focusing on positives and not negatives. Your son needs you. Stay strong.
ME- 31 W-25 T-5 M-3 D2 ILYBNILWY and moved out - FEB16 W seeing someone else - JUL16