Relationships are so delicate and can break on minor issues and simple misunderstandings. Once broken, it is a die-hard task to mend the relationship and get back the same intensity of affection in the relationship. There can be visible reasons, may be a misunderstanding or communication gap, at times it can be a mistake of someone else; fragile relationships can break over any simple cause. The cause for the easy breaks in relationships is that relationships are mind products, subjective to each person.
Many relationships are not the union of best possible matches but best available pairs, or when people misconceive the partner so. Relationships start blindly by peripheral understandings and attraction; it proceeds through adjustments, forgiveness and understanding; and breakup over misunderstandings, mistakes or lack of tolerance. Getting back into the relationship, though difficult, is possible if approached the issues with the right understanding and mind to change and mend.
You may not be able to change the partner as you desire; but you can very well change yourself. Changing yourself is the better way of resolving the issues and renewing the problems. The changes may make you appear more appealing and accepted by the partner. You can also try to implement certain changes in the partner but if the person is willing, then the only way is to change yourself to comply with the partner. Changing oneself doesn't mean being submissive to the partner, but following a better way to be in a more satisfying relationship.
Most of the issues in relationships can be resolved with right communication with the partner. It is commonly observed that slight misunderstanding or ignorable mistakes are many a times the cause for several breakups. Approach the issues in a relationship, positively and try to make each partners understand the real situation. Communication means conveying the facts and truth and also offering support, help and forgiveness each other. Talk with a mind of acceptance. Do not try to defend or resist the arguments of the partner and accuse each other for all the mistakes. Let the communication be creative, rather critical.