The word "together" emphasizes the idea of shared experiences and companionship, indicating that the speaker finds great joy in moments spent with this person.
The phrase "my favorite place to be" metaphorically compares the feeling of being with the person to a cherished location. It suggests that among all the places and experiences in the world, being with the person addressed is what the speaker values most.
In essence, this statement beautifully conveys the depth of affection and the sense of home and belonging that the speaker associates with the presence of the person they love. It reflects a deep emotional connection and a genuine appreciation for the moments they share together.