Kind of makes sense. I noticed he was a pretty amazing guy, but nothing ever really told me what my big problem was. Amy liked him, but I'd seen Amy flirt with people before.
But there was a guy...or maybe it was a part of The Doctor's psyche, I'm not sure, started pointing out all these differences between us. Mister Hero and Mister Normal.
Kind of makes sense now, a lot of things about Amy. She's got a hero worship for The Doctor and I didn't feel like I could measure up.