You cannot delete questions. They may be removed if they do not follow the site rules, but I doubt all of your questions will be deleted. The best thing to do is to go anonymous with all of your questions. After that, you also can disavow your questions after a set time frame. Please see the link below for more details:
Spread the word. This person is a catfish. Just got done talking to them on kik. They sent me pictures and did a google reverse and found every single one of the. Alys_sah is a catfish. And now has blocked me on here because I figured it out.