Someone has told the speaker, or perhaps the speaker is telling someone, that they are "more than enough." That should feel like comfort. Instead, the speaker admits that this is exactly why they're still scared. The poem is built on that small contradiction: kindness and fear arriving together.
The speaker seems to be afraid of losing something good. When someone matters this much, the stakes feel higher, and the worry grows with them. The last two lines make this clearer. "Leave me" can be read as a request ("leave me be, I'm like this") or as a bleak invitation to walk away from someone who can't stop overthinking. The poem doesn't settle which, and that uncertainty is part of its feeling.
The mood is quiet, vulnerable and a little tired. The language is short and plain, with slightly broken grammar ("I still scared"), which makes it sound like an honest, unpolished confession rather than a carefully composed statement.