Honestly I wish I knew too but sadly all the chapters from 57-130 are locked and can only be read if paid for but when reading it you can slowly see that the ML starts showing signs of being worried for the MC.
A LITTLE BIT OF A SPOILERRR
Richard finds out that the ml is in love with him in chapter i think 68 in the novel. Because the potion that the ml drank and instead of falling asleep THINKING he did the deed with Richard he actually did it. It's because the potion only works when the person drinking it doesn't have feelings for the possessor! That means that the ml has feelings for Richard!!!
can someone spoil me how they will fall in love with each other? will it takes long for that stage