Beware the Overly Attentive
Although it might initially be flattering to have someone showering you with loads of attention, beware of dating someone who demands to spend every moment with you. This could be a sign of pathological obsession and jealousy. Abusers usually get their victims to cut all ties with friends and family so they can exert control and be the sole influence in a significant other's life.
Listen to Others
Pay attention to any negative comments made by your family or friends. If many are advising you to break off the relationship, it's a good idea to examine their reasons. Although you shouldn't expect others to enjoy your new partner's company as much as you do, if people are avoiding getting together because of strong objections to her, take their concerns seriously. Chances are they're more objective than you are, and if most of them agree your partner is bad news, she probably is.
Don't Ignore Criticism, Complaints and Blaming
You have reason for concern if your significant other seems to be holding you to a double standard. For example, perhaps he's frequently late for your dates and tells you it's not a big deal, but the one time you're late, he becomes indignant. It's also a bad sign if he complains a lot and blames others for his mistakes. If he's critical of other people, be careful. Even though he might praise you in comparison to a former girlfriend, he's likely to start finding fault with you as your relationship progresses, warns psychologist Steven Stosny in the "Psychology Today" online article "Are You Dating an Abuser?" Stosny points out that abusers often become the most critical of those closest to them.
Listen to Your Gut
Trust your instincts. If you're in a bad relationship, your subconscious might be more attuned to reality than your conscious awareness. If you find yourself constantly on guard, fearful of saying or doing the wrong thing, it might be because your partner makes it impossible for you to relax. You might also feel guilty about displeasing your partner and believe it's your fault even when it's not. If you're spending a lot of time worrying about how to make your partner happy, chances are she's not the right one for you. Good relationships are based on mutual trust -- so if you both have reason to be suspicious of each other, beware.