Yoda,
It's better to just ignore these in my opinion. There's no point in giving any extra validation towards women on a social networking website. But if you are going to leave them, you should also be congruent in your actions online, which means not liking/commenting on all OTHER photos and then just ignoring those ones. If you do, she might confront you about the incongruency and feel like you're purposely neglecting her.
- Franco