The poem is tiny, but the title does a lot of work. "1.00 a.m." tells us when this is happening: late at night, when most people are asleep and the usual guard drops. In that quiet, the speaker enjoys a particular kind of closeness, the kind where two people share things they wouldn't say to anyone else.
The speaker's feeling is simple and warm. They say "i like it," plainly, without dressing it up. Then comes the single line "it's cute," set apart on its own, almost like a small smile. The word is casual and a little shy, as if the speaker doesn't want to say something bigger, like "I love this" or "this matters to me," but is clearly feeling it. The lowercase letters and missing apostrophe in "dont" add to that relaxed, unpolished tone, like a late-night message. The mood is soft, private, and affectionate, with a hint of nervous tenderness underneath.