I agree that you should trust your partner, and he should trust you. A tiny bit of jealousy is not a bad thing in itself. Personally, when my husband shows just the smallest bit of "you're mine, remember!", just by maybe touching my back lightly at a party when I speak to another man, it makes me feel good. It makes me feel that I belong.

And of course, friendship. My husband and I were friends way before we became lovers. In the friendship there was an inherent element of trust, and that has carried us through 28 eighty years of married life.