Complex sentence: As the time passes she finds herself realizing she truly loves Takumi, and is the other reason why she choose him rather than Nobuo, she is even satisfied being the number 1 out of 100 women in Takumi's life.
Split into simpler sentences: As the time passes, she finds herself realizing she truly loves Takumi. She reasons that her love for him is why she choose him rather than Nobuo, and she is even satisfied being the number 1 out of 100 women in Takumi's life.