If you are lying to each other, eventually the other person is going to find out. If you have accidentally spent too much money on something, or forgot to pay a bill, you need to let them know right away. If there is a problem, then be honest, accept responsibility for your own actions, and work things out. Many problems can be avoided in the first place if people are just honest with each other.
If you can do these things, every day, they will help build the foundation for a strong relationship. There are other things as well, like if you have an argument, try to resolve it in a timely manner. Take responsibility for your own actions, and do not blame the other person for them. Do not go to bed angry, and tell your partner you love them before bedtime, and as much as you can throughout the day. Be playful with them, go out for a date at least once a month no matter what. The biggest piece of advice for young people is do not have kids for at least a year after getting together or being married, take the time to know and enjoy each other first.
