Someone (and by 'someone,' I mean Ami. Or maybe one of the others, with some advice. They gotta realize it's not a good thing, right?) has to set her strait about that habit and get Mako dating all healthy-likeThis is true.
On the other hand, it also makes Makoto's crushes seem even more depressingly self-fulfilling. "You remind me of the guy who crushed my heart… Wanna go out?"
Oh, well, she'll probably grow out of it. Well, we hope she does, anyway.