They refuse to introduce you to their friends or family.
Obviously, it would be a little strange to meet the family after only a single date. But if time has passed and you're starting to get serious or hoping for a future, it might be time to meet the rents. If your partner isn't interested in introductions, it may be time to rethink whether or not they're going to stick around or get serious.
"It's even worse if you never spend any time together during the day or engage in activities in public places," relationship expert and author Kevin Darné says. "Staying in and ordering pizza or other takeout whenever you're together most likely means you're considered a booty call."
[Photo via Reshot]