The phrase "Fall in love with somebody who will never let you go to sleep wondering if you still matter" highlights the significance of emotional reassurance and communication in a partnership. It implies that a truly loving partner will consistently demonstrate and affirm your importance in their life.
In essence, this quote encourages individuals to seek a relationship where they feel cherished and appreciated every day, where they don't have to question their significance or worry about their place in their partner's heart. It underscores the idea that a loving relationship should provide a sense of security, where both partners continuously reassure each other of their worth and importance.