I do agree that Finnrey was the intended romance until Lucasfilm stupidly succumbed to the #reylo insanity sparked by TLJ director/writer Rian Johnson.
Boyega was totally against the direction of Finn in TLJ right from the get-go and even called out the director during cast interview promos in front of a live audience.
https://youtu.be/n06cosq93r8
Disney probably have Boyega a warning to control his low-key hints .....then when it was all over Boyega was like ...now this is the real story.