Wellll, not dying and worth watching are two different questions. 😛
I am like you in that I won’t watch anything with bad endings and the first season does end without them dying, so that’s settled. But is it worth watching? That depends. I enjoyed the show on its own merits and was invested in Julia Stiles’s character, which is good, because the f/f part is pretty minor. There’s not much more outside what I already giffed and posted. I did like it, though, I thought they were interesting and at times sweet. I would say to try the first ep and if you don’t like it, try just their scenes if they’re available somewhere.