5 Questions need grammar help

Can someone give me their opinion please?

1 How is it best to wear your hair with a strapless dress?
2 Short hair doesn't look good on him/He doesn't look good with short hair.
3 His breaths are closer apart/further apart than mine when he breathes. (What does this mean and is the sentence correct?)
4 There were 3 seconds betwween each of hid breaths.
5 To give you an idea of how far my house is from school, its like from here to your house.it's as if you went from here to your house.
6 He would help you when in need, just as I would help him if he needed it.
7 If my action make me come off as pretencious...

Thank you