Advice on relationship or fling?

Hi

My wife and mother of my down syndrome daughter. I love them both, I do work away from home but never unfaithful. Anyways my wife in the last 3 years hasn't had sex with me. I did ask and ask if there is something wrong. All I got was an argument on the topic. I don't know what she gets up to when I'm away for periods of two months at a time at the least I'm away with same time roughly at home. I don't know if divorce is right as don't think I can afford it and my kid to have her life disrupted on because of me not getting any intimacy with my wife. Anyone go through this and survived the lack of it and how or what will help. As I can't do with fighting with my wife. Yes we give each other a cuddle when I'm leaving or coming back from being away at work. Any advice please.

Updates
1 y
No she doesn't want to talk about our intimacy with me what so ever, it's like she's given up on that side of our marriage and relationship.
Advice on relationship or fling?
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