Could you please help me correct these questions PLEASE

I'm having a hard time correcting thee sentences. Could you please take a look at them?

- How is he going to pull it off when his dad couldn't do it to begin with.
- They look like friends/like they are friends.
- She is a nice person, may I add that/if I may add she's pretty ugly, so you have nothing to worry about.
- You're cooking smells so bad, it's making me want to kill myself.
- I understand you better than you understand yourself.
- You have 5 hours on me, which is why you aren't tired. I went to sleep at 7 am you went to sleep at 2 am.
- I never thought I'd love someone the way I loved you.
- The fire has gotten worse./has spread.

Thank you