Advice on current circumstances?

so my partner stopped sending as much “x” as used to before. When it comes to the talk about the birds and the bees time. They are always tired or using silly excuses. This has happened since starting work and would tease during the day but nothing near the evening. when bringing it up they get annoyed. They did have a troubled past with exes and things like that. What should I do?

Advice on current circumstances?
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