"I Think I'm In Love With You" by Jessica Simpson is a song about the overwhelming feeling of falling in love. The lyrics describe how the protagonist feels whenever the person they are attracted to is near. They admit to feeling a bit crazy and shaky when this person is mentioned. The protagonist's friends notice a change in their behavior and suggest that something has come over them. The chorus reveals their realization that they are indeed in love with this person. They confess to doing silly things and expressing their feelings for this person to their friends. In one particular encounter, the protagonist sees the person they are infatuated with hanging out with their friends. The person catches their eye and surprises them by looking directly into their eyes, causing their emotions to escalate. This encounter further solidifies their feelings. The protagonist acknowledges that something strange has come over them and that their feelings make them feel special and excited. The song ends with repeated affirmations of being in love with this person and expressing their feelings to their friends. Overall, "I Think I'm In Love With You" portrays the overwhelming emotions and excitement that come with falling in love. The protagonist can't help but act differently and express their affections to their friends, showcasing the intensity of their feelings.