Sol - the mind is a very powerful thing. I allowed mine to runaway with me for 6 months without AD. I don't recommend it. I cried everyday for six months. It didn't do me any good.
What I suggest is thought stopping. It'll help. It did for me. What you do is whenever a thought of your H comes into your mind, you say STOP and then force yourself to think of something else (not related to him). It can be anything. I could be a thought about what it would be like to win a gold medal, learning to drive a motorcycle, or even a happy memory you have that doesn't involve him. Make a list so you don't have to come up with it on the spot.
The point is, my continued thinking about my H drove me crazy. Forcing myself to STOP and think about something else has helped me tremendously. You can do it. It'll be tough at first but it'll get easier. My first day of thought stopping... I had to do it 46 times in one day. Now, two weeks into it, only about 15. Eventually, I hope he'll just drop from my mind.
Check out Prather's "Little Book of Letting Go" and another (author?) "How to Fall Out of Love" They are great! Check them out!
Stay Positive! You're doing Great!
When you are happy as an individual, you are in a better position to determine whether a partner enhances your happy life or weighs it down.