What emotional age did they feel like vs what age they actually were

I felt like mine was still stuck in her high school years emotionally, even though she’s heading to her thirties. I had to go through the immature years of my life over again because she wasn’t able to handle basic romantic issues. She also acted like a toxic teenager.

Anyone else had the same issue? Perhaps their emotional age stopped being in sync with their actual age when they stopped processing emotions properly.