I'm sorry you're going through this, but you seem to make it a lot about you, and how she needs to get over her problems to serve you better... but she's likely not happy herself... what do you do for her? Do you do things for her to make her happy? Do you help her out in non-sexual ways and tell her you love her, with no pressures or expectations?

Relationships are about give and take. I find it pretty sexist, this old notion of wives always giving, giving and giving to their husbands, while the husbands just take, take and take from their wives. It takes TWO people to both be selfless for the other.