Your versus You're

These two words are words I find used wrong often, and I am not sure why.  They are clearly used differently and mean two different things.

Your-using your means that something belongs to you.

You're-you're is a made up of you and are and it means you are.

As you can see, these two words are totally different.

You would never say your welcome.  Does this indicate that the welcome belongs to your?  You could use this version of the word like this:  I am bringing your child support payments to you now.

Following this idea, you would not say you always manage to disappoint everyone with you're self-centered way of thinking. You would use your for that.  You could, however, say you're so self-centered.  As in YOU ARE SO SELF-CENTERED.

A few more examples of the correct uses of the above two words:

YOUR:
~Your children deserve better!
~You destroyed your family with your selfish ways.
~You need to get your life together.

YOU'RE:
~You're a loser!
~You're a liar!
~You're a cheater!

YOUR AND YOU'RE:
~You're going to have to suffer the consequences of your actions.

I think these are fairly simple words to use correctly.  If you're not sure which word to use just try it out in the sentence that you're working on.  When you read or say the sentence see if (you are) sounds correct, if not, you're using the wrong word.