Instinctively I would respond to this “why yes, of course!” because I have so many very close male friends who I adore and would never, ever want to take anything further with (including a couple that were my brosmaids.) But, like a few other women on here, when I think back, each and every one of them has either made a pass or declared their love at some point! That’s not me being vain I think it’s just a result of our closeness or them misreading my friendliness (or them being a bit desperate at the time lol).
However, with them all I’ve laughed it off and we have remained very close. DH doesnt care how much we talk/spend time together/go out/go on weekends away etc, because he knows if I wanted to be with them I would have gone for it years ago! In fact, he was one of those very friends many moons ago and I rather liked him :)
The only time problems have arisen is when they’ve actually got girlfriends and settled down. The friendships have become noticeably distant, and the only reason I can see is because the new partners don’t like their boyfriends having female friends.
So in answer to your question, as much as I want to say yes it can, in my experience it very rarely is completely platonic on both sides. Even with my GBF, we’ve had a moment somewhere down the line..!