No, otherwise it would not be an opinion. you can turn a
hypothesis into factual info by carrying out an experiment.
Make sure to take it easy on your hair with heat and stuff like that. Find a good repairing shampoo and conditioner. If you do use heat on your hair make sure to use a heat protectant I can't remember what mine is called but it's a spray and it's in an orange bottle. Those are all the tips I follow and there may be more but I think following that should help out:)
A causal friend might be a friend of a friend or someone that is in your class who you talk two once a week or less. A close friend knows all about you, defends you and you talk to every time you get a chance.