Hi all! Thank you to everyone who's responded with their POV. Wow. I did not expect this much polarisation, or some of the genuinely out there takes. Just got in from work so I'm only now sitting down to read everything properly. I'll work through the replies as I go, there's a fair few things I want to address, and I've got a bit of an update after chatting to my friend too, but it might take me a while so bear with . But in short : had convo with friend - it was a good long conversation with an apology, listening , her talking about what she was and wasn’t “upset” about (in quotes for shorthand because it’s more nuanced than that ) and we ended in a good place) stuff will BF will go over more when I’ve more got head around it (not that I’m not having thoughts and haven’t acted at all but again lots to process and catch up on ) . I’ll start by addressing a few of the most urgent pounds I want to flag/respond to :
One thing I need to say straight away though. SHE IS MY BEST FRIEND. I honestly thought that said everything on its own. Eight years of a deep, lovely, completely platonic friendship with someone I trust infinitely. And to be clear about who this next bit is aimed at, because it's not everyone who disagrees with me. If your view is basically 'nobody should share a bed with anyone who could theoretically fancy them', fine. I think you're wrong, but at least you're consistent. Who I'm actually talking to is the people speculating that she has feelings for me, that the booking was 'telling', that she's probably single and pining after me. Come on.
Her fancying me makes about as much sense as her fancying her sister, and same goes for me. I know this because I know her and she knows me. That's how being best friends works. Eight years, thick and thin, shared beds, drunk nights, stressful times, and nothing has ever come close to happening. It's not like it's some unspoken subject either. It's come up loads over the years in normal life. Her telling me about her dating and her type. People asking if we're together and us laughing it off. Our own jokes about it. Every single time, it's just been two mates with a deep, entirely non romantic connection . There's no world where she's lying to me about how she feels. And even in some made up world where she was, there's no world where she'd try it on with her best friend. Yes, I know stories exist of people being totally blindsided by a friend, and no, I can't be one hundred percent certain, but nobody can be one hundred percent certain of anything. I'm damn near it though, and getting from what I've actually told you to 'this is realistically possible' is a massive leap, and one that rests on homophobic stereotypes and assumptions. Oh, and she did not have a 'meltdown' about the separate room. She said 'okay, if that's what you think is best'. How some of you got a meltdown out of that, I really don't know. That's not how I presented it and not what I was asking.
Since a few of you asked, I'm straight. I didn't mention it originally, not on purpose, but honestly I don't think it matters much. My certainty doesn't come from being straight, it comes from knowing myself and knowing her. Between 'best friend' and me telling him outright there's no attraction on either side, my boyfriend has everything he needs to trust that I know what this relationship is. And even if I were bi, I'm in a committed relationship, so it would still come down to trust.
For those asking if I'd be okay with him sharing a bed with a gay friend he was that close to. Yes. I actually went further in an earlier reply when someone asked about an attractive straight woman he swore was platonic. Been thinking about that a lot since our argument and honestly? Still yes. If it was a proper longstanding friendship like mine and he'd reassured me the way I've reassured him, I'd take him at his word. I know that'll blow a few minds, and I know some of you think I'm naive for believing properly platonic friendship can exist between people who could in theory fancy each other. But I do. That said, I'm not sure my answer there should even be the takeaway. As I said in my OP, and as plenty of you have argued yourselves, the comparison isn't quite the same, so even if I wouldn't have been okay with the reverse, I don't think that would automatically make his take justified.