Unsure what my "100%" truly is

So my wife and I were talking about how she feels like I have never given my everything to her emotionally, like I almost do but its never 100% and more so doesn't stay consistent. Anyways, does anyone else feel like they dont know what giving someone 100% of them authentically is for them? Like, I can say for certain I have never given anyone else more of myself than my wife, however I cant help but agree that at times it feels like I don't even know myself.. If anyone can relate/give advice that would be awesome ty:)