Just my opinion :)

sorry to disappoint some people here, but heasoo was not crying because he realized how much taku love him or realized how much he loved taku
He was crying because he realized the emptiness in his life, something he didn't want to lose, ( JOOWON) "if felt like something was being cut out from my life it make me really sad"
It take a long long long time, but everyone understand their feelings, the 3 of them was selfish, at different moment,
joowon was to sure about his relationship with heasoo, and act wrong because he want to protect him.

heasoo put himself as a victim, and putting all the blame on joowon

Taku only act for him and for his personal satisfaction

People can say what they want, Joowon have the biggest character development, and he is the most mature

it would be time to stop calling him "brother" or that he was only there to "fuck" with heasoo as many think,
it's been 70 chapter since they did it the last time
it’s also joowon who refuses in this chapter to sleep with him

http://www.mangago.zone/read-manga/love_or_hate_yeongha/uu/d_chapter-3/pg-4/

the relationship was toxic, but it’s not like that anymore, they both grow up, and if people continue to blame the relationship, you can’t only blame joowon, heasoo was not an angel, he was wrong too.

http://www.mangago.zone/read-manga/love_or_hate_yeongha/uu/ibx_chapter-87/pg-5/

I understand that some of you want Taku To be the end game because you like him
But honestly do you really feel some chemistry ? Love ? Do you think taku and heasoo are happy like that ? Taku feel alone/sad when he is with heasoo and feel happy when H is sad that so weird (chapter 93) Or it’s because you don’t like joowon, so you want taku to be the end game ?
the relationship taku has with heasoo only brings out his bad sides, he feel insecure because he know heasoo is still in love with someone else

we can't force heasoo to go out with someone he doesn't have romantic feelings for, that would be unfair even if for a lot "it's the best choice" it doesn't work like that, I know loh is just a non real story but it’s the same in reality you don't go out "with the best choices"