Sam M's "Lately" captures the nervous thrill of a new closeness, tangled up with doubt. The speaker notices that things between them have changed, but instead of simply enjoying it, they keep asking why. The repeated line "I thought you were lying" shows how hard it is to believe the other person's kind words. Calling the other person "special" while describing themselves as "just me" suggests low self-confidence, as if the speaker can't quite see why they'd be chosen.
Still, hope keeps breaking through. The looks that give the speaker "butterflies" are a small, honest sign that the feeling is real. The line about being "everything together / But only something apart" sums up the poem's center: the speaker feels complete only in the relationship. The short, blunt ending, "You're mine," reads like a mix of joy and reassurance. The mood is shy, excited, and a little insecure, like someone daring to trust a good thing.