Firstly, it implies that every aspect of the speaker's being is devoted to and enamored with the person they are addressing. Their love knows no boundaries or reservations.
Secondly, it signifies the depth and wholeness of the love shared. It's a love that encompasses every part of the speaker's self, leaving no room for doubt or hesitation.
In essence, this statement celebrates a profound and all-encompassing love, where every part of the speaker's heart and soul is dedicated to loving the other person completely and without reservation.