The confusion around your and you're is a complete disaster. It's absolutely everywhere and it would be so good to sort this out. If only people could think, 'am I trying to say YOU ARE, or not..?'
If you're unsure, the apostrophe is there to indicate a missing letter. So you're means 'you are', with the 'a' of 'are' missing
If you are talking about ownership, such as 'your bag', it's simply your.
You are (you're) is NEVER written as your.