Changes Aren't Always Bad

Jordan and Kellan have been best friends since they were both 6. When Kellan was 10 he ended up moving for his dads job. Now that he's back, Jordan doesnt believe any of it. Kellan comes back with a totally different appreance and personallity. Complete opposite of the 6 year old she first met. Bad boy Kellan now changes Jordans "alright" life, into a life full of worry, stress, irritation and just plain madness. Do you think their friendship will go back to being the same now that Kellan is back? Or do you think it'll become better, or worse?