Talking Heads - And She Was Lyrics Meaning

Unquestionably she killed herself. First of all, the title is past tense -- she was, but is no longer. She joined "the world of missing persons" -- she's gone. And she died by her own hand, since they sing "She was glad about ... what she's done."

Some of the lyrics describing her experience could be describing a drug-induced state, but would she, under the influence of a hallucinogen, make sure she's not dreaming and "take a minute to concentrate"?

Gotta be suicide.