The phrase "I miss you a little" acknowledges the initial feeling of missing the person, which may start as a subtle yearning. However, it quickly escalates as the speaker realizes that their longing is growing stronger.
The addition of "a little too much" suggests that the intensity of the missing feeling is already more than expected or desired. It conveys a sense of longing that is becoming overwhelming.
The concluding part, "and a whole lot more each day," highlights the progressive nature of their emotions. It implies that with each passing day, the speaker's yearning and affection for the absent person intensify, deepening the sense of longing. In essence, this statement beautifully captures the bittersweet and growing nature of missing someone. It conveys the idea that the more time passes without their presence, the stronger the feelings of longing become, creating a profound and ever-increasing sense of missing them.