One major relationship killer alot of people take for granted is, involving a third.that particular person who knows everything about your relationship, who gives advice on what to do and how to do it, etc.
Sometimes, these friends or elders who you confide in, might not be happy with how well you talk about your partner, so there would be a possibility of giving wicked advice.
Restrain from getting advice from family and friends, as this may lead to comparism which would surely not go down well with your partner.
Learn to sort out issues yourself, and talk to your partner about how sad you feel about things you don’t like in the relationship.
Also learn how to talk to your partner, and study your partner’s mood before initiating some conversations.