Why would a guy not delete your number even after a fight?

We had a huge fight after a few days of our first date.. We both were equally at fault.. But I was the one who apologized because I didn't want to lose him.. He did not accept my apology.. After a few days, he uploaded a status of winning an award in his company, I congratulated him and he said a simple thank you.. But we did not say a word after that.. Although, he hasn't deleted my number yet and continues to view my status on whatsApp.. What is on his mind?
Why would a guy not delete your number even after a fight?
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