Most Helpful Guy
You cannot delete any of your post as long as they're not violating the guidelines.
However, You can also Disavow the question, which makes the question Anonymous and you'll no longer receive notifications.
To Disavow, hover your mouse over the broken link symbol next to the question title on your question list page and click Yes.
For more information :- http://www.girlsaskguys.com/faq/posts#610