It's going to feel like you can't do anything right by someone on July 23d. And you're right; you can't. But the problem isn't you – it's the other person. As a Libra, you tend to be more open-minded about criticism. You're all ears if someone has something valuable to impart, but if someone is just putting you down, then you'll just smile, nod, and retreat from the conversation. Unfortunately a certain spoiler in your life isn't getting the hint so you may have to take matters into your own hands. Do it with your customary grace and pointedness and s/he will get off your case.