Love at first sight is not always a good thing. In fact, it could be dangerous! Experts say that most abusive people come across as true romantics at first, because they get serious right away. Saying things like "You're the only one for me." Or, "I don't know what I'd do without you." Here are four more warning signs that you've met an abuser: #1: Irrational jealousy. Abusive people often get crazy jealous of coworkers, clerks, and waiters. If you have doubts about someone, try this test: Call at the last minute and say you need to break your date because a friend needs help. If they say, "I'm disappointed but I understand," great, but if they get angry, make you feel guilty, or trash your friend, stop seeing them. Red flag #2: Possessiveness. Experts say that a steady stream of calls and text messages may seem flattering, but it's really an attempt to control your actions and your time by keeping track of who you're with and where you are. #3: They criticize your friends and family. Abusers know that the less input you get from others, the less likely you are to wise up and leave. So, they put down the people you're close to in order to isolate you from them. The last sign you're dating an abuser: They mistreat animals. A Northeastern University study shows that people who don't treat animals well are five TIMES more likely to commit violent crimes against people.