15. Zero hobbies or interests. The relationship will become their hobby, and you can kiss yours goodbye.
16. Smart phone addiction. If they can’t go more than 2 minutes without checking their phone… well, that’s kind of a red flag, actually.
17. If they act different towards you when around their/your friends compared to how they are in private. That and when you go out together and they spend the entire day ignoring you or forget about you being there entirely.