1. Does this person seem happy? It’s generally not a good idea to hook up with a person who’s basically unhappy and looking for you to fill the void. Happy people know themselves, their values and their interests, and have more to offer.

2. How is this person doing in their other primary relationships: family, siblings, best friends and co-workers? Sometimes we ignore evidence of people being surrounded by chaotic and dysfunctional relationships in the hope that we’ll be the one true exception. This is probably not a good idea.
3. How did this person do in past romantic relationships? What has been the intensity, frequency, duration and context of these loves? Look for patterns that indicate their relationships have been meaningful and have lasted for significant periods of time. They should have a good, coherent explanation of why things ended, including both parts in the demise.