Fillow? Wow! I'd got Faith pegged as totally hetero so that's too far out on the left field for me to catch! Please bear in mind two of my lads are gay and when they came out it was a bit like Andrew so I have some experience. That said - it would fit in nicely with the idea I have of new social couplings (I'm not saying homosexual couplings are new - just what F and W represent). Yay...I'm really liking Fillow!
Yes Faith is written as hetro, which is why any relationship would have to be a slow burn. She did become very close with Lady Genevive and even shared a bath with her, so I wonder if we were meant to infer that Faith wasn't totally closed to a same sex romance. And I do think it would be romantic, and quite soothing for Faith to have Willow caring about her . . . I might be thinking far too much about this 😀
I like your reading on Spike/Buffy, that language doesn't contain the words they would need to say how they feel about each other and really it's actions that are important. This might work for Buffy, who is action-gal after all, but deep down Spike is still the romantic poet who needs words and needs to believe what's said to him, so for his sake I hope Buffy does find the words 🙁