Do you not want me to see you in your everyday clothes?
Do you not like being seen in your everyday clothes?
私服 は英語では everyday clothes です。
こう言えますよ:
❶Do you not want me to see you in your everyday clothes?
(僕に私服姿を見られるのはイヤですか?)
❷Do you not like being seen in your everyday clothes?
(私服姿を見られるの嫌ですか?)
と言えますよ。参考に!