I just thought I'd reply to you as you don't seem to be getting many responses.
The old R that I had with my W would be that we would argue, then not talk, then when we got to the brink of parting one of use (usually me) would crack and start making amends. If I told you that during 2004 my W and I bearly spoke to each other for the whole year, that would give you an indication of how bad things had got. So keep this in mind that communication will be something that you will need to work on in the future.
For now you are on the right track, you've stopped the begging and pleading and you are being upbeat when you see her. Next step is to just take you focus off trying to repair your M and take a look at yourself and think about what was it about you that first attracted W to. The big cliche on this board is to work on yourself but actually that is what you need to do. If you start becoming an attractive and interesting person I'm sure W will want to spend time in your company.
Some ideas for working on yourself, do you work out, go to the gym or do you have any outdoor activities you are interested in or could take up. Are there things you used to do but sopped doing when you got married. Have you changed you wardrobe recently, do you need new clothes. Are you clean shaven, do you where aftershave. These are the type of things that wil make you interesting and attractive.
Have a think and list some of the things you could do for yourself, make yourself some short term goals, post them here or keep them to yourself and work on them.