Oh okay! I totally get it now. But my question remains, is there any difference between over-adjective and overly adjective? Or are they both interchangeable?Right. In AE we would say "too girly" but not "overly girly" or "over-girly".
I am not sure why. As a guess, "overly" is a pretty formal word (which matches "reliant" and "emotional") while "girly" is extremely casual and slangy. So people that say one word probably don't say the other.
For example my speech includes "overly" but not "girly". I would say "overly feminine".