This is a good way to improve our English. Thanks

show English movies and try to speak with your colleagues in English. practice everyday.. it's very important

yes it's correct. I think you can also use I have a poor English

Both of them I think

You should practice your English with people who speaks fluently. Practice everyday will help you to improve your language skills.

your sentence is right but the word supper we write it super (only one p) and you can also say: If he's happy without me, I'm really (or very) happy.

No, your sentence is not correct. You can say: I've never seen a pretty lady as you are. there is no need to say before when you use never, it's the same meaning. That's what I think!

Yes it is correct, you can also use "Thanks a lot"; or "Thank you so much" it's more formal than many many thanks.