Why is it so difficult to let that significant person go?

It's difficult to let that significant person go because you invested so much time in them. They were a big part of your life for some time. Without them, your life may seem empty. You have to get adjusted to living your life without them.

Mainly because we have been around them or have known them for so long the fear of not knowing what life is going to be like without them takes over and we often tend to replace that fear with a different emotion like sadness, depression, confusion or anger as a coping mechanism.

Letting someone go is incredibly difficult. It's hard for many reasons but I think mainly because you've invested so much time and energy into your relationship with them. It's hard to let something go that you've given so much to. When you have to do it for yourself and your health, it's helpful to acknowledge the pain and then move forward on your own journey. Do your own thing, and eventually the pain will subside. I can't say it will go away completely, but it will subside.

Because you think that nobody knows you well or will love you like he/she did. You think that they're the only ones who understand you because they're your soul-mate, and if they go, you'd have no one.

Because everyone we meet, especially those we love, becomes a part of us. Sometimes growing means moving away from that person, but that doesn't make it easy to start the separation.

It's really difficult to connect with someone at first place and on top of that we can't afford to lose someone we have spent lots of time with.

That's because how attach are we to them, and some flashback and also the memory that we had with that particular person, all we need is time, it will heal everything

That significant person was a major part of your life, Its normal to not want things to change. But at the same time change can be good. Keep your head high and your options open. :)

There are many reasons for this. Biological and psychological reasons contribute to it. As humans we seek intimacy, closeness and a family in some form or another, we invest a lot into this and when things don't quite pan out like we had hoped it's often quite difficult to let go. There's a saying in economics and psychology known as the sunk-cost fallacy that basically describes why and how it's so difficult for us to let go of things that we've invested so much of ourselves into.

When you become attached, the emotions that are associated with those people are still there. It's not easy to let go of them.