The song "Di Ko Akalain (I Didn't Expect)" by Alex Gonzaga talks about the surprise and unexpected turn of events in a romantic relationship. The lyrics convey the singer's realization that she has developed feelings for someone and how she couldn't imagine that it would lead to this point. Initially, the singer expresses how she had been searching for the person all day and suddenly, they appear. However, despite their presence, she doesn't feel anything towards them. She reflects on how it wasn't long ago that she couldn't sleep because she couldn't stop thinking about them. She also remembers the moment when she admitted to herself that she had feelings for them. The singer then expresses her disbelief in how things have turned out unexpectedly. She thought that the person was meant for her, but now her feelings seem to have vanished. She acknowledges that there's nothing they can do about it. The song also highlights the singer's admiration for the person's appearance, but questions if it was all a dream or if she has just woken up to reality. She wonders if her heart has grown tired of loving. She realizes that her initial attraction to the person was strong, but now it's completely gone. The lyrics further convey the singer's frustration and confusion. She describes the relationship as being irresistible even if it's costly. She expresses her actions of indecisiveness and feeling foolish. The storm of love has caused many to fall, but all she ever thought was that the person was her beloved. In the end, the singer reiterates her surprise at the unexpected turn of events, where she thought that the person would be with her forever, but her feelings have disappeared. She emphasizes that there's nothing they can do about it. Overall, the song portrays the singer's realization and acceptance of her changing feelings towards someone, highlighting the unexpected nature of love and the lack of control over emotions.