Most harmful partnerships involve Pisces. Pisces guys are not the worst boyfriends, but they consistently choose the worst partnerships.
They see the positive in everything. They are severely insecure in relationships because they consistently chose the wrong individuals.
Virgos are jealous. Most people think that working such things out before getting into a relationship is crucial, but Virgos are skilled at masking their weaknesses.
Because you love him, their manipulation and making you feel guilty will easily turn into an emotionally abusive relationship.
Taurus guys are the most self-centered. It's good to focus on your career and life, but they'll always put work before family and relationships.
If you're faithful and committed to them, you'll have someone who believes in you and supports you.