I did read season 8 and Faith and Giles are finally a duo although it's left unclear if their relationship is platonic or not
Did you read it to the end?
I'm pretty sure it's platonic since 1) the comics would've shown otherwise if not and 2) Faith only trusts men who are not trying to sleep with her. She has the default "all men want one thing" but she got emotionally close to the Mayor only after he made it clear to her his interest in her wasn't sexual; same thing with Angel. She usually dumps those she sleeps with - Wood tried to change that and it seemed she was more open to a real relationship, but in S8 we see it didn't last.