I suppose the main thing is to keep the main thing the main thing. Love and relationship alike, is like a garden, one must take time to water, cultivate and pull out the weeds. For the fact that it is like a garden, one must ensure that he has the confidence in himself to ensure that the garden will remain a garden, and not turn into a bush over time. Maybe with this kind of confidence, he will consequently gain the confidence of others (in this case, his significant other).
In this process of nurturing the garden, we seek for resources. Books, consultation, experience sharing, may be of benefit, for later if not now. It's just like when you dig the well before you are thirsty. With some expectation that all of of us can be hurt, that some of us can, and some will, at times, fail, we prepare ourselves by accepting the simple rule - that we can take the worst, take the risk. Life is, after all, a risk. You love and be loved, hurt and be hurt. I believe that love may break, but I also believe that it never dies. Maybe it only changes shape.