#7 and #8 are insanely bad advice if you want a long term relationship. If you (for example) dislike her brother or your parents dislike her the sooner you deal with this as a couple, the better, particularly parents. Either you are a couple - and you deal with her brother and your parents as a couple - or you are an individual.

If you hold your family relationships as secret - meaning also "separate" - from your relationshp with your partner, this will cause problems. Depending on how close you live to, and how close your relationship with your family is, these problems can quite easily lead to the end of your relationship.

I think most of the advice in this article is sus or crap, but 7 and 8 are horrible at another level.