So I was going through the champ skins when I saw Tango Evelynn and Tango Twisted Fate. I got curious on if they were a couple or not and apparently a JoJ or something said they were? I looked it up. So I wanna know who exactly is a confirmed couple.
and 
are also in a very 'Romeo and Juliet'/'it's Complicated' relationship.
has a crush on 
as suggested by her taunt for him.
is interested in 
as suggested by her taunt for him.
and 
used to be a canon thing but with the lore update it's unclear.
Evelynn and Twisted Fate were a couple, but that is no longer canon with Evelynn's VGU.
Additionally:
x used to be a couple, but they broke up.
x 
political marriage
Crushes:
states that he had a crush on 
, but that ended when she started talking to her guns.
has a crush on 
, he named his mecha after her (Tristy).
Maybe there are more, but these are the ones I can think of right now.
I like Lux and Izreal
Well Rakan and Xayah is canon everyone knows that but I just have to add
