I often feel my partner doesn’t want to hear me in important conversations. S/He interrupts me, changes the subject, misunderstands, blanks out, or leaves. What can I do?

I presume it is your husband you are talking about. In this fast pace of technology and communication, the attention span of people in general has reduced. In the family system, it is a bit alarming as people involved have their own pressures and the focus point becomes a challenge. However, there is always a solution to everything. It is important to set family time as the world functions on clock system and there is very little spontaneity of emotion. You can make the effort since you have identified the problem and create quality time where no electronics but only communication. Try standing away from the situation and you will find it easier to change the mood of the conversation. I need to know more specific situation to answer in detail.