See, I really don't think they were.
They were comrades, friends ... brothers, not lovers. More like Han and Chewie than anything else.
And if they were meant to be gay, if we get a JKR style "of course they are, we just couldn't say that", then fuck you Disney.
It could have been done subtly but definitely. I hate that we're still at the stage of having to try to read things like this into subtext.
That's one thing the last Star Trek film did really well: here they are. They're gay. We don't feel the need to beat you around the head with it. It's obvious, it's normal. And that's the point. Or should be anyway.