Rosie seems to be going through that stage of teenagehood when her hormones are in high gear. I feel bad for Fizz though. John Stapes, he comes back into her life, they rekindle their former feelings for each other and then he meets Sally and she wants private lessons from him and is attracted to him but Rosie gets her claws into him and so while feeling guilty about Fizz, Rosie's coming on to him and he's not exactly turning him down and then Sally tells him she has these feelings for him that she doesn't understand.....so, he become yet another Corrie Street "womanizer". Rosie also developed an unrequited crush on Liam which he isn't interested in. Amazing what some young women will do when they are turned down, so to speak. Liam told her flat-out he wasn't interested and so off Rosie went, hurt feelings and all and is now bent on coming on to John and he to her. I guess every man Rosie meets, who is good-looking, she feels if he doesn't come on to her, she will try and flirt with him.
Liam also seemed to have feelings for Carla and when they kissed, she didn't exactly push him away. You need a scorecard to figure out who's who on the Street and all the various triangles. Not for nothing is Coronation Street called a "soap".