It's embarrassing, but it's also understandable. I think if your supervisor has decided to ignore it, then you should take this opportunity to **not ruminate**. So silently thank him, and forget it.

Advices are always easy said than done. Rumination is defined as "keep thinking about a problem which had already been, or can never be solved". The real problem had already been solved at the moment he decided to ignore it, so the only problem here is your rumination. To stop it, every time you feel embarrassed about this topic again, my tip is to shake the idea in your head, like it's just a toy. This will make you distract from the negative feeling. 

<sub>You may want to read this article: [Why You Should Stop Caring What Other People Think (Taming the Mammoth)](https://waitbutwhy.com/2014/06/taming-mammoth-let-peoples-opinions-run-life.html).
</sub>

If you like, after you have completely relived from this guilty, say a thank you to him without mentioning why. He may ask "for what?", and all you need is smile 😜