I can't really fully back this up, but Faye seems to have fewer friends to go to than the rest of the core cast. Marten has Tai and Claire, Hannelore has Marigold and possibly Momo, Dora has Tai, secret bakery guy and also her employees (if that counts, at the very least they don't seem to dislike her like they dislike Faye). I'm not really bothered by Faye's prickliness, but it seems like it's isolated her even while she's part of a pretty sizable social circle. I feel like it's a bit of an unfair assessment because she did open up to Sven and Angus, and a lot of the good friends I've listed for other characters are significant others. It's just something that struck me when I tried to think of who else Faye could go to, compared to, say, Marten who honestly gets along great with everyone to the point that if he had a rough patch he could open up to most anyone in the cast at his discretion.
Maybe I'm really off-base though.
Fake Edit: To be fair she did get genuinely close to Sam