I'm sorry to tell you this, but I know your happiness depends on me but I can't handle it anymore.
What do you mean? Why do you think my happiness depends on you?
You're always looking for me to validate your feelings and it's too much for me to handle.
It's a good thing to know that you may not want someone to be emotionally dependent on you. NOT knowing that would make a good relationship impossible.
Are you okay with that?
Yes, I can handle that information. I didn't realize that I was stressing you out so much. Tell me next time before things get so far out of hand, you can tell me anything you need to.