perhaps the first time he got mad at DG, because he thought BETRAYAL
his ex had betrayed him ... and for him the betrayal is like a trauma, so I think he got angry for this reason, no because he's in love with DG
my opinion
I also have a guess, that maybe later on Alex will realize he's such a jerk like his Ex to DG.. then he will have a denial and guilty stage , and later on... he will accept DG's love on him and he's doubt about love will eventually fix. (≧∀≦)
There is no betrayal because they dont go together Alex has always tried to say that DG was just a sex partner so there cant be betrayal when there wasnt even any trust in the first place
no, I do not mean that Alex got angry that day because he misunderstood with MD (I know they're not together) ... Since Alex's ex has betrayed him
for him That business with MD was a bad thing (maybe they re-started his bad memories)
But I did not say Betrayal because they are together I know they are not together ... but I said betrayal in general ... he hates betrayal because of his bad experience that's why he reacted that way (I think)
I frel like Alex wants DG to say he loves him. Why? Just bear with me. Uf Alex didnt really want him he would of never gotten mad about MD, yall noticed he started having flashbacks once he started thinking about MD taking DG away. Alex is just scared that DG might end up Doing what his hyung did. I can see it now if that wasnt the case he could of straight up told DG hey look we gotta stop having sex instead of avoiding him and then realizing that DG cared about him cause imma be honest even when i know a person like me i probably dont realize all the nice things they did . But thats just my thoery