Seven should have stayed single.
She should have in that "looking back on it, I wasn't ready for a relationship.." way, but really it's all grist for her learning curve. And Chak is the perfect starter package. Kind, stupidly patient, easy to break up with. Won't hurt her. He's her training wheels boyfriend.
Whatever was going on with Auxum was happening in some fairytale escape garden. It's probably helped propel her to the point of wanting
a relationship but it's not taught her much if anything about being in one, in real life.