Warning signs reveal a girl's worthiness for long-term relationships. When I play music at my place, if she changes it without asking, she's getting fucked once and never again. I'll cut her shit off and say, "If you wanted to listen to your music, invite me to your place." This tests whether she respects your space and autonomy. Unsolicited advice is another red flag—if you didn't ask and didn't show openness, she should shut up. She's not your mom and doesn't have more life experience.