Yep. It's one of the aspects I love most about the PT. Anakin doesn't turn out of love, but out of fear of loss. It also explains why he attacks Padmé on Mustafar because he fears he's lost her to the Jedi. Which is why when he saves Luke in ROTJ, it's such a beautiful moment -- he must realize that by stopping Palpatine, he himself will die and he'll lose Luke anyway. But he does so regardless.