SPOILER!!!
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So in chapter 160, Medea confesses to Heli that she loves him in a 'hidden' message. The chapter is named: The Most Pathetic Profession of Love in the World
In the official translation on Webtoon, she says to Heli
"can this insignificant me become your refuge" as in even with all my flaws can I still be your home?
and near the end of the chapter heli says
"please win and tell me again so that I can accept it (the confession) so that you can live in a safe and happy world"
So in this chapter, they both confess to each other in a around-about way and Heli finally knows how she feels.
For sure read this on Webtoon the translation is so much clearer and the important info is not lost.

It's progressing pretty slow, im bored, and this is an original story so there's no spoilers ╥﹏╥ anw both madea and psyche are a literall goddesses, i love both of them with all my life. Heli is such a cutie pie omg if madea aint want him, let me take him pls and im so broken with his backstory i really hope madea would love him back :(