We will tell you what you need in a relationship, where you screwed up (without knowing it) in past relationships and a customized action plan to make your next relationship successful.
If your subject has no social media presence, try to find their friends and family members; it's possible they're hiding their account behind a fake name.
If you have no idea who their friends and family members are, and you know their full name, use a free people search like Intelius to look up relatives..then hunt down those relatives.
Individual data points don't mean anything unless they can be connected to other data points to make up a person's online presence.
Once you have several facts about your subject, you'll need to use your brain to make connections and fill in the blanks.
Whether you're looking for yourself or a friend (no judgment), here are five tips for finding out anything, about anyone, online: It doesn't matter how little you know about the person you're looking for, your search is going to start with Google.