Relationships have evolved and changed. You never heard about a person suddenly changing when they were with your grandmother or grandfather. You grew up hearing different stories about love so it is hard for you believe the kind of stories that we hear now. However, that does not mean that they are not true because they are. They are very true and this happens a lot. You cannot guarantee anything in life and you cannot be sure that when you wake up tomorrow, this person sitting with you right now will be there or not. However, love is worth every chance. If you unfortunately witness when they suddenly change, here is what you need to do:
List down the possible causes for the change.
It has hit to you that your partner is different. They suddenly change and now you are stuck with thinking and analyzing the situation. The first thing you need to do is assess that what has caused the change. What was different before and what is different now? Is it a temporary phase or has something permanently changed? Look for all the reasons and list them in your head. Are they going through workplace stress? Was it after a big fight? Has someone else said something to them? They will help you address the root cause and take your relationship to a better position.