Now that I'm visiting the UK, the time difference isn't nearly as bad. I'll give her a call very soon. The problem with living overseas is you can't make international calls with cell phones, and I'm usually asleep by the time her day is done (and vice versa), so we generally have to set up a Skype appointment in advance.
Just to let you all know, she and I are pretty close. I won't go into any details, but I'm one of the few people she has confided in about a serious illness affecting somebody she deeply cares about. She also said that she'll make dinner next time we meet up for one of our TV marathons, so we were planning on meeting up again soon after my return.
I'm thinking I should have told her before I left for Qatar, but it did not seem appropriate at the time. I thought my feelings were just happiness at having made a friend who had so much in common with me. But now, as I've gotten to know her better, they are genuinely romantic. If she just wants to stay friends after I tell her, I'll be content with that. I'll even be fine waiting through the possible period of awkwardness because at least then I would've gotten it off my chest. But I know that if I don't tell her, and she ends up with this other guy, then I'll regret it forever.