Looking for help on ways to find a certain kind of website to use for research.?

I am writing articles for a company. They require that no matter what your article is on that you cite at least one source. The problem is that they recently changed requirements so that you can now ONLY cite a website that ends in .org, .edu or .gov.

Okay normally that sounds logical and simple since everyone can post anything they want on the web. The issue, I write about dating issues for a man's website. The topics they have must appeal to the average person, which is not something that is usually anything other than a matter of an opinion. I have spent a week trying to find credible ways to find sites like this, but have not had much luck. I need sites that offer ways to know when women are cheating, mentally unstable in a relationship, tips on date ideas or dating tips.

If you know any sites that offer credible articles on these topics, or a search engine that is better to use when looking for sites ending in .gov, .edu, or .org please share with me! Thank you so much!