What is the simplest way to make a relaionship stay long?

Trust each other..!!

Should be trust and honesty...

Make your partner addicted to you by treating your partner as you will want your partner to treat you.

The communication is number one key to a relationship. If you don't have that you have nothing. The other elements are being considered, patient and compassionate with your partner.

trust and understand eachother

trust and honesty...

"Blind Trust" Who not trust you, do Blind Trust upon him, after some time you can find him with an unbreakable relationship

Spend a LOT of time apart! ;----)~~

Should be trust on their relationship!