你可以说"I've become introverted"，意思是"我变得内向了"。

"Introverted"这个词源自拉丁文"introvertere"，意思是"向内看"或"向内反思"。在心理学中，"introvert"通常指的是一个倾向于内省、保持自己的人，而不是外向、社交性强的人。

例句：

"She used to be outgoing, but she's become more introverted since the pandemic started." (她过去很外向，但自从大流行开始后，她变得更加内向了。)
"He's always been introverted, but he's learned to be more comfortable in social situations over the years." (他一直很内向，但这些年来他学会了在社交场合更自在。)
"Introverted people are often misunderstood because they don't seek attention pke extroverts do." (内向的人常常被误解，因为他们不像外向的人那样寻求注意力。)