F your girl friend is telling her friend that she don't know if she love her boy friend or not,but she don't want to loss him,what is the meaning

May I ask how old you both are and how you found out what your girlfriend is telling her friend? It might help shed light on what is going on.

It may mean she stills cares about him or loves him a different way that is not romantic. Or maybe she is but she doesn't fully know it yet.

You never answered the question about how old you both are.