我太闲了：

"We’re both approaching 40 and have been married for ten years."

This is correct, but a slightly clearer phrasing could be:
"We’re both nearing 40 and have been married for ten years."

"At the start of our relationship, she was loving and generous, always writing me little love notes, buying me gifts and making me feel special."

This sentence is fine, but the word "always" could be made more natural in context:

"At the start of our relationship, she was loving and generous, often writing me little love notes, buying me gifts, and making me feel special."

"But I think that was just an act to get me to fall in love with her."

The sentence is fine, but "just" could be omitted for smoother flow:

"But I think that was an act to get me to fall in love with her."
"Once we were married, it all stopped."

This is grammatically correct, but adding a bit more detail could improve the sentence:
"Once we were married, everything stopped."

"Instead, she started making me feel like I wasn’t good enough."

This is clear, but adding "as though" can make it sound more natural:
"Instead, she started making me feel as though I wasn’t good enough."

"She’d flirt with other men in front of me, put me down and compare me to her friends’ husbands, who earned more money in their jobs or were better looking."

This sentence is generally fine, but "in their jobs" could be simplified or omitted:
"She’d flirt with other men in front of me, put me down, and compare me to her friends’ husbands, who earned more or were better looking."

"The more she did it, the more it knocked my confidence, especially in the bedroom."

This is correct but could be more concise:
"The more she did it, the more it eroded my confidence, especially in the bedroom."

"Over the last few years, I’ve felt so inadequate that I’ve stopped coming on to her."

This is fine, but you might consider using "making advances toward" for a more formal tone:

"Over the last few years, I’ve felt so inadequate that I’ve stopped making advances toward her."

"When we do have bedthings — at her initiation — I sometimes can’t perform."

The word "bedthings" seems odd and might be better expressed as "sex" or "intimacy." Also, "at her initiation" could be replaced with "when she initiates" for smoother flow:
"When we do have sex — when she initiates — I sometimes can’t perform."

"Then she’ll make me feel like half a man."

This is fine, but "feel like half a man" could be more sensitive in phrasing:
"Then she’ll make me feel inadequate."

"Recently, I discovered she’s been sleeping with a guy who she works with."

This sentence is grammatically correct but a bit awkward. You could omit "who" to make it smoother:
"Recently, I discovered she’s been sleeping with a guy she works with."

"I confronted her and, instead of being contrite, she at first denied it and then blamed me."

This sentence is fine, but adding a comma after "at first" could improve clarity:

"I confronted her, and instead of being contrite, she at first denied it and then blamed
me."

"She said if I gave her the attention she needed, she wouldn’t have had to go elsewhere for bedthings."

"Bedthings" could again be replaced with "sex" for clarity:
"She said that if I gave her the attention she needed, she wouldn’t have had to go elsewhere for sex."

"I feel so jealous and unable to trust her."

This is clear, but adding "that I" could help with the flow:
"I feel so jealous that I’m unable to trust her."

"But if I try to talk to her about it, she just shuts me down."

This is correct, though "shuts me down" could be a bit more formal:
"But if I try to talk to her about it, she just shuts me out."


【 在 ximei 的大作中提到: 】
: We’re both approaching 40 and have been married for ten years. We have a son aged eight.
: At the start of our relationship, she was loving and generous, always writing me little love notes, buying me gifts and making me feel special.
: But I think that was just an act to get me to fall in love with her.
: ...................
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