5 questions need help

Could someone take a look at these please?

1 He's done more for me than you have.
2 You only think about/of yourself.
3 I hope you'll never be happy in life.
4 When will you be able to walk home on your own from school.
5 Too much exposure to the sun cause wrinkles later down the line.
6 Kids try and find themselves in adults. They look up to people.

Thanks