books in which ex girlfriend/friend is saved rescued by ex boyfriend from abuse

[Sheila]

books in which ex girlfriend/friend is saved rescued by ex boyfriend from abuse or self harm

Maybe the male has return home or chance meeting reconnect and he discovers something is not right..

[bb.]

Hmm Pushing The Limits by Katie McGarry does sound like what you're looking for, but they are not exes. But it does centre around him trying to help her not self-harm and he's a really sweet guy so you might like it.