confused about uke’s first love

so uke’s female friend, eunsoo, had a thing with uke’s first love’s wife. uke’s first love found out and killed himself. obviously it is terrible and would hurt the uke, but why would he have to bear any kind of responsibility or guilt over that?? his first love texted him saying he blamed eunsoo for everything and basically is why he killed himself. why did this guy feel the need to text uke about it as if it really had anything to do with him?? it makes sense for uke to be saddened over his death but him loving the guy had nothing to do with any of what happened so i don’t understand how or why he felt that loving the seme would cause anything bad to happen. that’s what annoyed me so much about the uke. MAKE IT MAKE SENSE