It's correct. As the two people above said, the only wrong is that you don't need a comma because the position of "if" is in the middle. But if it comes at the beginning of a sentence, you will need to put a comma(just like this sentence).
29 czerwca 2015
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The sentence is fine - except you don't need tie comma after "happier."
29 czerwca 2015
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It sounds fine to me. Your friend came out with you last night, but you had such a miserable time together that you wish that he or she had stayed home.
Other than the spacing/ punctuation, I can't see a problem with your sentence.
29 czerwca 2015
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Nadal nie znalazłeś/łaś odpowiedzi?
Napisz swoje pytania i pozwól, aby rodzimi użytkownicy języka ci pomogli!