It doesn't seem all that weird when you think about the fact that a great majority of comic writers and artists are straight guys.
Whatever his intentions, the writing comes across as respectful and real. So, I'm pleased with it. As long as Kate doesn't become a stereotype or a vehicle for gratuitous boobage, I'll keep buying the comic.
Still, don't feel bad for being sensitive. It's a sensitive issue considering how badly media tends to handle LGBT characters. It's good to keep an eye on things.