They were not on the same frequency.
Although Heinz realized that Grace had misunderstood him, he couldn't bring himself to clarify the matter to her.
Things were progressing well, he was afraid that the moment he opened his mouth, he would mess things up and cause Grace to leave in sorrow.
However, if he kept quiet, he didn't know how long they could keep this up.
Heinz pursed his lips and looked at Grace. Then, he said in a deep voice, "Grace, you just need to remember that you have to trust me at all times. Believe in my love for you."
Grace was startled at his heartfelt words and lifted her eyes to look at him subconsciously. She said, "You're very strange. You have repeated these words many times. Don't you think you're being long-winded?"
Heinz pursed his lips awkwardly. He lowered his head and said, "I'm afraid that you won't believe me in future and might leave me if anything happens."