Trust is the base of every relation no matter it's a love affair, a friendship or something else. If you don't have a trust then you don't have anything. If you can't trust people, people won't be able to trust you as well, this is simple logic. And when you are not trusting people and people are not trusting you as well, you won't get a long term relation. Relation will be there but it won't last long, moreover it won't be something that you will like. Now if you fake trust you might get the trust of your partner but as you are not trusting your partner you will always have a bad feeling about your partner. This bad feeling will lead your relation to an end for sure. Think positively and try not to worry too much about your partner. This is where a long term relation starts.
Now comes earning trust of people. If you trust people and don't allow them to trust you then you will always get the bitter outcome. You have to behave, act and communicate with people in a way that they can trust you. People often try to make their partner jealous but this becomes a boomerang often, when your partner can't trust you anymore and they leaves you as a result. Making your partner jealous is good for a short term relation but when you are going for the big fish please don't try to make your partner jealous because today or tomorrow jealous partner always losses faith.
There is no Bible for a great relationship management but what I can tell you is you need dig it and you need to learn if you want to get into a great relationship you need to give it some effort and brain. And remember trust is the key to every long term relationship. A few suggestions and reviews from you would be real inspiration for me. So please feel free... :)