Relationships 101
Always speak the truth; seriously because this is how you build a trusting relationship! You don’t have to be “brutally honest” often, though sometimes you will.
Learn how to talk about the hard for you topics. Many couple wait until the relationship is bad, then have to see a therapist who can teach them this stuff, and not all therapists are good at teaching this. You can do this on your own!
Understand the difference between healthy and unhealthy relationships because the consequences of the latter are grave; toxic relationships can lead to critical physical ailments.