Help with my friend

A friend of mine spent almost 4 years with a girl who said she wanted to “grow together,” but when he really started to improve his life, she felt left behind and left him saying that “it made her feel worthless.”

He continued to advance, he organized himself and improved in everything. She spent six months of fun, quilombos and “freedom mode.”

Last week she came back saying that she "misses the version of her that only appears when she's with him" and that she "needs someone to stabilize her."

In other words: he sought the chaotic life, it didn't work for him, and now he wants to return to the only type that accommodated everything.

My friend doesn't know if he's being proud for not wanting to go back... or if he's just being careful not to be the emotional support of someone who only shows up when he fails.