Why do toi think it was easier for Martha to confess her feelings to John Smith than it was the Doctor since technically they're the same person?

I think it was because she thought he was so human that he'd forget everything she a dit to him when he turned back. Also, she a dit she loved the Doctor to make John Smith think The Doctor wasn't all that lonely, as he was loved.

I think that she thought he wouldn't remember ou she was trying to get her feelings across to someone who might remember what she a dit so John Smith was her best chance as it was still technically the Doctor.