Rakan doesn't really love Xayah
Rakan (The Charmer) is engaged with... an edgy female with a nose ring?
I feel like Rakan is just staying with Xayah because he knows that she would actually go suicidal at the slightest moment of failure or disappointment.
There is nothing charming about Xayah whatsoever. Her voice and character as a whole are just edgy.
Rakan is a the kind of guy who would be better off with Ahri or Miss Fortune.
But in the end, these characters were made by some Rioter and maybe Rakan does truly love Xayah. This is just my theory. Either way, both stories are interesting.