1) You’re

You’re is a contraction meaning you are
هي عبارة عن الفاعل you و الفعل are

Example: You’re too late for ice cream
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2) Your

Your is a possessive pronoun like my or his
هي ضمير الملكية للمخاطب المؤنث و المذكر المفرد و الجمع

Example: Who took your book
من أخذ كتاك. الضمير “ك” في كتابك هي your باللغة الانجليزية في هذه الحالة
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more examples

correct: You’re a real friend
wrong: Your a real friend

correct: I know your name
wrong: I know you’re name

correct: Let us go in your car
wrong: Let us go in you’re car

correct: He thinks you’re too proud
wrong: He thinks your too proud