i just finished my NC

I just finish my NC and am ready to initiate contact with her,am about to write and elephant in the room text,because I acted very very needy and desperate but I never did anything stupid apart from been needy and desperate.
What must I write here to help me not look needy,what should I include apart from accepting the breakup,any hint ?.

Let her know you’re working on your negative behaviors. And take it from there according to how she responds.