If you input his name into the Google search engine you should be able to see what social media belongs to on Facebook, Twitter, and Instagram.
If Internet Explorer's Cross Site Scripting Filter blocks your search results, go back to the "People" page, and click the link to this page again, then try your search again.
Another option is: In Internet Explorer, go to Tools and choose Internet Options from the Menu bar. Look for for Enable XSS Filter in the list of options, and click Disable.
You will now be able to display Custom Google Search Results on your Browser.
But by far, thier phone is the number one thing to look out for and if you can relate to even two of the items in the list above then you are on the right site.
Imagine how good it will feel when you confirm he or she only dating you. But now you can stop wasting time on people not worth being with.