Most Helpful Girl
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Girls don't see it because girls are attracted to traits and characteristics in men that are defined as mutually understood, but are actually different.
We can come to a consensus as to what "nice" means. We can also come to a consensus as to what "treating her right" means. Be respectful, and treat her like a sentient being. Give her gifts and your love. That's what we agree on when we use this language, but that's not everything. If you're the nicest, most respectful man she's ever met, you're a great customer service representative, but have no sex appeal.
What matters is how wet you make her coochie. That's it. That's how the most vile, inbred fucks manage to reproduce although they don't succeed with all women for socioeconomic reasons. That's how nice guys who follow the book don't get any play, in spite of having the best intentions in the world.
The bottom line is, being nice is par for the course, and you need to make her genitals FEEL something. You do so by being a testosterone driven man that shakes the cage and looks like he can lift things, particularly HER, so you can FUCK her.
Unless you're confident in that regard, girls are not going to be as confident in your boyfriend skills as you are.