There's a great blog out there called the Big Red Flags Blog, where users post "red flags" about their boyfriends and girlfriends that they spotted but chose to ignore.
According to the creators of the blog, here are some of the worst red flags about women to be on the lookout for:
1. Her body issues exceed normal limits -- If your girlfriend can't eat a meal without calculating calories, you're in for years of stress and very little fun.
2. She's obsessed with marriage -- All women think about marriage. Just watch out for the ones who think about it (and badger you) 24/7.
3. She thinks her dog is your child -- If you end up constantly taking care of her yippy dog, she's using you, man.
4. She has a record of dating jerks -- Girls with sketchy dating histories, especially a pattern of bad guys, have serious problems. You're not going to save her. She'll just end up dumping you for the next bad guy.