Dominique & Teddy were always at Harry’s house helping with the kids. Ginny may have liked Victoire & Teddy together, but she knew from years of watching Teddy & Dominique that they were meant for each other. To her, they were like Remus & Tonks.
When Victoire broke up with Teddy, he let her lie and say he broke up with her because she was too scared to come out to her family as a lesbian. They remained close friends & Teddy helped Victoire get the strength to come out to her family.