This is part of a long history of songs about a person moving to L.A. to seek fame and fortune, leaving home and everyone there. The most famous is "Midnight Train to Georgia," but there's also "Everybody Knows This Is Nowhere" and "Do You Know the Way to San Jose?" (Side note: The last of these is a Bacharach/David composition, and Ben Folds Five was clearly going for that type of feeling with this song's arrangement.)
However, whereas those songs are from the point of view of the fame-seeker going home (or at least considering it), "Don't Change Your Plans for Me" is about other person being the one who goes back. The person who decides to go to L.A. is enough reason for him to keep living, but not enough to keep living in L.A. He wants her to continue seeking what she wants even though he feels he can't stay there.
This is part of a long history of songs about a person moving to L.A. to seek fame and fortune, leaving home and everyone there. The most famous is "Midnight Train to Georgia," but there's also "Everybody Knows This Is Nowhere" and "Do You Know the Way to San Jose?" (Side note: The last of these is a Bacharach/David composition, and Ben Folds Five was clearly going for that type of feeling with this song's arrangement.)
However, whereas those songs are from the point of view of the fame-seeker going home (or at least considering it), "Don't Change Your Plans for Me" is about other person being the one who goes back. The person who decides to go to L.A. is enough reason for him to keep living, but not enough to keep living in L.A. He wants her to continue seeking what she wants even though he feels he can't stay there.