Halima Abubakar hints on once having a bad friend

Halima Abubakar has hinted she just left a girl-girl relationship hinting it was messy. She gave the advise to her thousands of followers on Instagram advising them to be careful of friends like enemies.
At the moment, Halima's friendship with Tonto Dikeh has hit the rocks, while that of she and Cossy Orjiakor (once good friends) has also been thrown into the ocean.

Who is Halima referring to? Cossy? Tonto? Oh or may be an unknown friend? We shall be careful henceforth, thank you. (smiles)