In my opinion, you don't need a BFF to talk shop about relationship troubles. You just need someone you know and trust to some extent, has a level head, experience, and willingness to give advice. Again, I go back to Faye. In reality, she's the queen of issues before starting a relationship. And behind that tough exterior, I have a feeling she'd be able to give the same advice Marten would.
Yeah, as long as she's not involved and not in smartass mode, Faye is pretty level-headed on relationship issues. And yeah, you're right, what she would tell Tai is probably pretty similar to what Marten would tell. That's an interesting obvservation, that highlights how, no matter what, Faye and Marten are really BFF.
As for the idea that Tai has nobody else to talk to, it bears interesting implications. She seems to have mixed levels of maturity in various domains, and would preferably go to someone older for advice on relationship matters. Plus, really, Marten has shown to be
really reliable and thoughtful and selfless (most of the time, at least). It may be uncomfortable to him at times, but really, if I were him, I'd feel honored that my friends put such a level of trust in me.
As for whom Dora could talk about it to, well, there's still Faye, but it's also the perfect setup to be introduced to her therapist.