[Tifa can tell that she's searching for something, and she wishes she could give her more than just simple reassurance. She wishes she could prove it somehow, but with how delicate she's being about pulling information from Mitsuru to get a feel for the situation, she can't say she has much to go on besides her own experiences, and her faith in other people. She hopes that it will at least be enough.]

If both people care enough about each other, then they'll find a way to work through it, no matter what. Sounds to me like that's the case for you.

[As for her friend...]

Won't know until you try, yeah?