@ParunnerGirl
My situation is similar. My DW doesn't masturbate, doesn't think about sex much and where I'm climbing the walls wondering when the next element of sexuality will feature in our relationship, I know she's on her computer looking at gardening websites or other day to day non-sexual stuff - it's just not on her radar.
She knows it's a problem and wants to do something about it, tells me she still fancies me (like you, I ensure I'm fit and healthy - I have a similar physique to an olympic swimmer and have trained 3 times a week for years) yet clearly she doesn't fancy me enough to want to have sex with me.
We do occasionally have sex, but it's such a disappointing and unfulfilling experience for me as she is just so passive. She will go along with things and if I suggest a different position will oblige, but would never suggest a different position herself, or ask for me to do something, or adjust her position to make it more pleasurable for her. She just lies there and experiences it.
If I ask her to go on top and 'ride' me, her movements are awkward and mechanical, like she doesn't know what she is doing and is just slowly going up and down purely for my benefit - her movements are't for her pleasure - she'd never close her eyes and get lost in it and revel in the feelings, rather just look at me and smile in a friendly and non sexy way. It's almost off putting where I have to close my eyes not to be distracted.
I've never ever heard her say harder, faster, deeper, slower etc - she just goes along with whatever is happening in a pleasant kind of way.
I get so bored and despondent by the lack of enthusiasm and desire that that several times recently I've just given up as it's been that terribe. But when I do, whilst she's sad that she knows she's not pleasing me, she's not disappointed for herself or her own enjoyment, where you'd typically expect someone to be left high, dry and frustrated.
I ask if she enjoys it and she says yes, but not to the degree you'd hope for. She can orgasm most of the time from oral or manual stimulation, but only if that is all that is going on - never during PIV or with a helping hand during PIV. I've even got her close to the edge and then tried PIV with manual stimulation but it doesn't work.
I've tried doing PIV before giving her an orgasm to see if that helps, but when it comes to 'her turn' we're starting from scratch - it's not like the PIV has got her nearly there and she just needs that bit extra, it's another whole 20-30 mins of one way traffic to get her there and to be frank it bores me rigid.
Because of the lack of enthusiasm or desire on her part, I'm always lying there mildly disappointed and spectating rather than enjoying the moment, hence I can never relax enough to enjoy manual or oral from her, plus her technique is terrible.
Even if we had sex every day, it's the quality and passion that is missing that is the key problem for me.
I dream of having a partner that looks deep into my eyes with sexual hunger and just 'wants it' urgently and longing where we both end up on a wonderful passionate journey together to a common goal.
I just don't know where to go with it and I'm intrigued as to what the sex therapist says about it all.