Can somebody remind me why MC is no longer with the ML rn??

Remember the beach scene where he was gonna kill himself but ended up cutting the seme without the tattoo, well afterwards he collapsed and was brought back to the lady’s house. While the dude left him at that house the gangster seme found him and took him away. Then the mc was kinda sad that the non gangster dude didn’t come for him and for some reason him and the gangster seme started fucking again for some reason???? ( BL logic smh) then the gangster hit the mc which put him in the hospital and then the mc lost his memory and is confusing his memories with both semes so he thinks that the gangster seme is pure -_-

I think the MC went with the gangster cause he was hurt by the other guy, thinking that he didn't deserve good things and that's why he followed the gangster, cause he deserved that.
Also he isn't confusing his memories, by what I understood. He blocked his memories cause he wants to be happy, creating a new memory where he lives by the beach with the other guy BUT he doesn't remember the face so he thought gangster was the other guy. (Sorry if it's confusing)