Is it better to change?

I usually love changes. For example I am very happy for starting university because I meet a lot of new people every day. Or I like having new hobbies. Or changing my way of dressing according to my mood.

But there is one change that it's difficult for me to be accepted. And it is when I cut my hair! Yesterday I was thinking that if my hair always grew healthy and shining I would never cut it. At least once in the future I would love to have it veeeery long, much more than now. 

And a friend of mine would like me to dye it: red should me my color according to him. But again I am afraid of changing. Last year I wanted it to become darker, but at the end I didn't have the courage to change! :(

Two years ago at high school a friend of mine had cut her hair really A LOT (they were, and they still are, not more than 5 centimeters) and our English teacher asked her the reason of her new haircut. The answer was "It's better to change". So the teacher took the opportunity (following her piece of advice) to change the classmate sitting next to her (her best friend) because they used to talk too much! Ahahahah

So... What shall I do?