 People change, sometimes dramatically, sometimes subtly. When people form a close relationship, their individual evolution can affect the stability and harmony of their partnership. 

Please, keep in mind that the core numbers in your profiles (your Life Path, Expression, Heart's Desire, Personality, and Birth Day number) tend to carry more weight than cycles do. However, cycles, like your Personal Year cycle, can cause upheaval in areas where you previously had no issues. When that is the case, try to remember they are most likely temporary. 

Hans Decoz