Boyfriend never mentions me to female friend these days?

My boyfriend told me he mentioned me to his female friend at work. These days he does some project work with her based at home where they sometimes chat at the same time. These days he never mentions me to her. As an example, it was recently his birthday and I made a nice celebration for him and the topic of his birthday came up between them. He quickly brushed past it and didn’t mention anything about it , the celebration or him going out for some nice food with me. I don’t know if he’s embarrassed to mention me these days. What do you guys think?

Boyfriend never mentions me to female friend these days?
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