Guys, Do the girl best friends ever remain just that?

10 years prior to the current relationship, a decade long online friendship with the ‘best friend’ exchanged nudes way back, still talk and discusses the current relationship. Is adamant about being only a friend yet will die on the hill of defending the girl best friend. Originally in the beginning said he will cut contact, 2 years later says he will never cut contact for current partner. Flirty memes and daily snap streak is paramount to him.

Online cheating 2-3 times, sorry everytime,
Wanting a males perspective…

Guys, Do the girl best friends ever remain just that?
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