Her boyfriends followed a pattern. They were attracted to her beauty or the fact that she owned her own spaceship. The moved in, made themselves comfortable, used her for whatever, got bored, lied to her or cheated on her, she found out and kicked them out.
Take Bobby for example, he told her he loved her. He was passionate, about her and about his causes. He stuck around and backed her up when trouble came. They may not have been her causes (although he tried to convince her) but, how could you begrudge him doing good works. Even when she discovered he had lied to other, all she asked was that he never lie to her.
He asked her to help him by using the Maru to make a pickup from earth. Turns out they were actually stealing the stuff, turn out they were rescuing Harper (although this wasn't what Bobby had intended), turns out what they were stealing were weapons, not computers as Bobby had told her, and that they belonged to the Drago Kazov who were rather unhappy about the theft. Beka kicked him out for lying.
Turns out, his causes meant more to him than she did.