I haven't read much of your posts so I might be way off base here.
I know the frustration of having her act good to you. It makes you think that her feelings have changed when in fact her head is in the same place. I am in exactly the same situation in this way. I have been doing this for 18 months and have not had an argument with my W in 17.5 months.
Even at 18 months, I do not think I would be wise to try and have an R talk with my W. Even if her feelings had changed, I don't think she would admit it because I don't think she is ready to deal with it. I think an R talk would just cause her back away.
I think rather than buying her things and asking her if her feelings have changed maybe try and concentrate on being attractive to her. Be strong and confident, flirt with her, compliment her. Make he feel good when she is around you. Make her laugh.
You should also realize that you could be the best man in the world and she will not react if she is not ready. I think I read that you are 9 months post bomb. I hate to say it, but that is not a long time.
Continue treating her the way you are and be patient.
M35 W37 S9 D6 M12 yrs Know 15 yrs Bomb 1/28/07 My Sitch Failure is the opportunity to start again more intelligently - Henry Ford