It's a tricky situation and needs the kind of massaging that the "you can enter me into the podrace" scene got in MagFan's Episode I edit.
A lot of the action here is phony-- Hayden is unconvincing as he "fixes" that machine. The metaphore that he can "fix things" so why couldn't he "fix his mom" is pretty tired. Then the revelation that he killed everyone really should have been the last thing these two "lovers" ever said to each other.
But if I may suggest some cuts by cutting up the dialogue, I think the scene can be romantic if we just let it be "Padme comforts a tormented Anakin." The one major revelation can be that he blames Obi-Wan for his mother dying.
INTERIOR: TATOOINE, HOMESTEAD, GARAGE - DAY
PADMÉ comes in with a tray of food. ANAKIN is standing at a
workbench, repairing a part of the speeder bike.
PADMÉ: I brought you something. Are you hungry?
PADMÉ puts the tray down. Anakin is tormented, but silent until...
ANAKIN: (angry) Someday I will be... I will be
the most powerful Jedi ever! I promise you, I will even
learn to stop people from dying.
PADMÉ: Anakin...
ANAKIN: (furious) It's all Obi-Wan's fault.
ANAKIN hurls the wrench across the garage. It CLATTERS to
the floor. He looks at his trembling hands. PADMÉ stares at
him, shocked.
PADMÉ: Annie, what's wrong?
There is silence for a moment, then ANAKIN breaks down,
sobbing. PADMÉ takes him into her arms.
ANAKIN: Why do I hate them? I didn't... I couldn't... I
couldn't control myself. I... I don't want to hate them...
But I just can't forgive them.
PADMÉ: Ssshhh... you're human.
ANAKIN: No, I'm a Jedi. I know I'm better than this. I'm
sorry, I'm so sorry!
PADMÉ: You're like everyone else...
PADMÉ rocks him, and ANAKIN weeps.
Note: I got this dialogue from an online script -- it may not be accurate, but I think these beats get you through the scene much better. It doesn't really matter whether he killed the women and children or not. It doesn't matter if he confesses to Padme -- he's clearly filled with shame and pain, and Padme assumes it's over his mother's death. They bond over this misery. That will allow the scene to work because that's a natural emotion. The twist in the scene is the way he blames Obi Wan, but ultimately tries to take responsibility himself. That makes him smarter and more noble.
P.S. -- I'm seeing Ep III on Sunday (lucky me!) so I'll start thinking in a bigger context that evening...