A successful relationship requires both communication and compromise, but it is difficult to do either when a partner is passive-aggressive. When there is an issue to be solved, they refuse to acknowledge it. Rather than talking about it, they find other ways to express their anger. Their partner is often at a loss as to the true issue, and lack of communication means it will not be solved in the near future. This places a painful strain on the relationship, and it is a good reason to end it if this behavior continues.
The failure of a passive-aggressive person to communicate is not necessarily an insurmountable barrier to continuing the relationship, but it will not be easy. The partner who is the focus of this behavior must learn how to interpret their mate's signals, and they must constantly review every decision they have made. Dealing with this type of behavior can become emotionally exhausting.