<human>: Could you distill the essence of the text into 1-3 sentences?

My 5th anniversary is approaching. My girlfriend is very devoted-- loving, sweet, and makes it clear that she thinks I'm perfect and totally the one for her.

However, it's not so clear to me. I do love her and I do feel comforted by her, but I'm nervous. Five years is time enough, I'm "supposed" to pop the question soon. But it feels like just that, a requirement that I'm uncomfortable with.

I can find things to complain about. She's not in the best shape. Our religions/philosophies disagree. She's very tense while I am very calm. Her family is a doozy, to say the least. I'm her first real love, and it makes me skeptical of how accurate her feelings really could be.

My sense of confusion about my own emotions was aggravated today by reading Murakami's short "100% girl":  In the sense of this metaphor, I'm certainly her 100% boy, but I'd give her something more like 75 - 80%.
<bot>: I love my girlfriend very much. I just don't feel like I love her enough to marry her. How do I love her more, or move on?