Be there for her and let her cry on your shoulder when its needed. Talker to her about everything, and make her feel special everyday<3
No you can't straighten your hair with chemical straightener but yes you can straighten it with a hair straightener or hot iron. Ive dyed my hair a lot and ive always used that to put it back to straight with my hair straightener.
Most of the time girls want to say it a couple days after starting to date. I would say it when you know you feel it. Don't say it unless its right whether or not the other person said it. Not everyone loves a person as soon as the other one.