Though butterflies may seem free, their burdens of being drawn to light comes with a price that may one day end their own life. Be weary of the wants and wishes, for to become free remarks that burdens cannot touch you, and without burdens you become weak and fragile. This is not you, so remain strong, stay true to those burdens, and carry forth with butterflies caress your mind ( ~,^ and stomach), but not to take away your life.
I do love the notion of butterflies blocking the way -- they're so fragile and ephemeral, but all we really notice is the superficial beauty. Which takes me on tangents far removed from your poem, and that's actually what I like best about any poetry.