Where'd the comment go? I wanted to say tell that guy that my manager is actually competent, so he has my respect, but I would not capitalize the word "boss". He may pay your bills, yet that doesn't make him family[1].
Anyway, I see guys mentoring guys all the time. There's nothing sexual 'bout it!
[1] https://www.grammarly.com/blog/capitalization-family-title/