I have a female friend called Alice (fake name). Someone else asked me if she is my girlfriend. I want to tell them that she is not my girlfriend but only friend. By "only" I want to mean that the only relationship between us is friendship. But the sentence below is ambiguous:
she is my only friend
It means two things to me:
- she is the only friend I have (that is, I don't have any other friends)
- she is my only friend (she is not my *girlfriend but only friend)
How can I remove the ambiguity? If I want to say that the only relationship we have is friendship.