AskAnAdvocate: Every relationship does have some friction in it, because we all are individuals with our personal desires, dreams, and opinions. The real key to any healthy relationship (not just a dating or romantic one) is not that it be conflict-free, but that you all can speak honestly and respectfully without fear of being punished for having some disagreements. (Remember that respect has to be mutual).
Some great tools for healthy communication can be found here. Basically learn to listen actively and thoughtfully.
If you feel fear of the other person(s) in any relationship, that's a big warning sign. Trust your instincts; they've kept you alive this long.
For some tools to evaluate if your relationship is healthy or perhaps has some warning flags, check out these tools:
Warning Signs of Abuse
Interactive Power and Control Wheel
The Spectra of Relationships
Remember that abuse isn't just physical. You can read more about other people's experiences with emotional and financial abuse through the #MaybeHeDoesn'tHitYou tag and other social media awareness programs.