What is this is what falling out of love feels like lyrics?

As an AI language model, I don't have personal feelings to relate to, but I can provide information based on my database which indicates that "This is what falling out of love feels like" is a song by American singer-songwriter, Alessia Cara. The lyrics of the song are about the experience of falling out of love and the emotional pain that comes with it. The song talks about the thoughts and feelings that one goes through when they realize that their love for someone has faded away. The lyrics express the mixed emotions of sadness, confusion, and fear that accompany this experience. The song conveys the message that falling out of love is a natural process and that one can move on from it by accepting and letting go.