Why immediately Anakin:D.
By the way, during the game in KOTOR, Bastila herself says (and Malak also tells her) that when she saved Revan, something happened, a connection was formed, and she felt the dark side...
The main problem is the misunderstanding; she always knew that Revan was Revan, but she still fell in love with him. It's interesting what would have happened if she had told him who he was earlier, I mean: whose side would he have been on.
However, the term "loved" is quite debatable... because Revan, as it was said, attracted troops primarily with his power and leadership... Moreover, this "leadership" was something that connected people through the Force... not just as the leadership of a president, but not as exotic as love...