Meaning of "Haircuts And T-Shirts" by Lifetime

"Haircuts And T-Shirts" explores the feelings of unrequited love and growing apart in a relationship. The mention of "airports" and "luggage" suggests a sense of distance and detachment from the other person, while reminiscing about "what's her name" who was "all books and quotations and no fun and games" hints at a past love that was intellectually stimulating but lacked excitement. The speaker seems to be stuck in a rut in their current relationship, feeling unappreciated and sensing that it's time to move on. The repeated refrain of "don't you believe it" reflects a sense of disbelief at the reality of the situation, as the speaker struggles to come to terms with the fading connection. The mention of changing the mood with music from the stereo suggests a desire to inject energy and passion back into the stagnant relationship, but ultimately realizing that it may be time to let go and move on.