I keep getting this while going for true end, I don't get why i keep getting this when I don't say I haven't returned to normal does anyone know what to do
The game keeps track of an "Insanity" value (variable 202 if you want to save edit or use MTool).
If this value reaches 100 (or over), you get the "no turning back" message, and are locked into the collapse routes.
Yellow actions increase this to varying degrees. For example, violating the girl in your classroom (the first one you brainwash) only adds 3 to the score. However violating the girl near the janitor adds 30. So not all yellow choices are equal. (It isn't random though, the classroom girl is described as loose, hence the low penalty.)
Dismantling the cursed insects also increases the score, though I never checked by how much.
Red actions add enough that you are guaranteed to go over the limit.
There is some inconsistency w/ the Yellow actions though, for example though access by a yellow choice not all of Aiko's commands increase Insanity. The "give panties" option is free, for example.
You can reduce the score by touching the orb that appears (eventually) in Sora's dream space, -10 per touch. However, my understanding is that it has limited uses (which makes sense, story wise) so you can't go too overboard w/ the Yellow choices.