Butterflies represent beautiful love, or women.
A butterfly falling into the water indicates love, a woman caught in life changes.
It is said that laying eggs in water represents a responsibility and traditional law.
In other words, the necessary thing is to change yourself and pay attention.
I think it may have something to do with wanting to get married and have children.
You saved the butterfly, but it still died, which means you can't change this natural law.
The people you talk to in your dreams also represent traditional experiences and opinions. You should let nature take its course and don't insist on keeping anything.
The change of a dead butterfly reflects a transformation, and there will be a new beginning, a new life, which may refer to married life.