I’m on chapter 52, and I still have no idea what the heck is happening. Can someone expl...

Me too ong

There are two lives. In the first, the Alpha (supposedly) seeks revenge on the Omega because he was responsible for the death of his parents (the Alpha was imprinted on the Omega and wanted to marry him). Upon learning this, the Omega decides to end his life to atone for his sins. In the second life, he tries to change the events, but everything was already destined to be. They meet again on the same night as in the first life. The Alpha has red hair because he thinks the Omega is in love with the other redhead, because, in addition, the Omega wrote him letters with his name from the first life, which led the Alpha to disappear, thinking he was in love with the other. Then the Omega realizes that he had confused the names because he had not yet adopted his name from his first life. He confesses the truth, and the Alpha believes him because he had had some flashbacks in his dreams. The Alpha returned because he genuinely wanted to marry the Omega because he has loved him since they met in childhood. They manage to break the spell, get married, and have children. The end.

Oh yes, Alef is the Alpha's Omega employee. Neither the Alpha nor the Omega ever had anything with anyone else.

Today’s the day I realize that I might just be dumb. Because I can read the words of your comment and understand them yet somehow it still didn’t registered in my mind what is happening. Maybe explain it to me like I’m 12 but also like I’m 2

First life (chapter 1 up until chapter 45ish?):
The Alpha believes the Omega caused the death of his parents, so he (supposedly) seeks revenge. The Alpha had actually imprinted on the Omega and wanted to marry him, but after learning about the parents’ deaths, everything fell apart. When the Omega discovers what happened (specially that the alpha was only with him for revenge), he decides to end his own life to atone for his mistakes.

Second life (chapter 45ish up until the end which is not uploaded yet):
The Omega is reborn and tries to change the events of the past, but fate still pushes everything toward the same outcome. He and the Alpha meet again on the same night they first met in their previous life.

The Alpha has red hair now because he thinks the Omega is in love with another red-haired person (The other red head that the alpha thinks the omega is in love with is the previous guardian of bluewarren). This misunderstanding happens because the Omega wrote letters to him (alpha) using the Alpha’s previous-life name. The Alpha thinks those letters were meant for the other red-haired person and disappears, believing the Omega loved someone else.

The Alpha comes back because he truly wants to marry the Omega—he has loved him ever since they met as children. Together, they break the spell that tied them to their tragic fate. They finally get married and have children.
That is the end.

The explanation about why the alpha is acting the way he is, is a spoiler as it has not yet been explained in the manwha

Alpha: originally black haired ML that dyed his hair red/orange because he thought MC loved another person (that had red hair), it's kinda like you changing your appearance so your crush notices you
Omega: Blondr haired MC

Don't confuse the ML with the long black haired alpha that is proposing to MC though, he's just a rando

Then for what reason was the alpha always smelling like another omega? The prince noticed it several times.