Take a look:
(Non-native speaker) You have to decide.
(Native speaker) Direct: Make up your mind.
You can also use:
Would love to know what you think by (time).
(Non-native speaker) It’s not certain./ It hasn’t been decided yet.
(Native speaker) Things are still up in the air.
You can also use:
There is room for discussion.
(Non-native speaker) I agree.
(Native speaker) You can say that again.
You can also use:
(Non-native speaker) I made a big mistake.
(Native speaker) I screwed up big time.
You should use:
(Non-native speaker) Everybody was terrified/ upset/ extremely surprised.
(Native speaker) Everybody was freaking out.
You should use: