There's this issue going on for months now, and I'm pretty much at a loss of what to do... So, first of all, I'm friends with BOTH halves of a couple. And I am guessing that is why I'm being so indecisive and whatever right now. But as of right now, I'm more inclined to the guy, rather than the girl, because of reasons that'll be elaborated on soon. Let's call the girl Niya and the guy Dave.

We don't live in the US, we don't go to an American styled school, and neither Dave nor Niya speak English (we communicate in our mutual language which is Mandarin). Both Dave and Niya are total anime geeks, and if you watch at least some animes you'll probably get why I'd say that they can be a little "chuuni" at times. And yes, it does carry over to their romance...

Dave is a really sweet guy...once you get to know him at least. He's admitted himself that he is kind of socially awkward and from that and my own experience/time with him, he's terrible with words and expressing himself. Niya is a pretty quiet, and quite literally, soft spoken. She's pretty responsible and reliable, but as of late, I think she may be getting a bit problematic in how she decides to handle her emotions.

Lately, Niya and Dave have fought/argued over things that they later confessed, were rather petty and small. They've also had some pretty big fights too. This itself doesn't concern me too much; I've been in a relationship before, and disagreements are bound to happen to any relationship. What troubles me is this:

They often show up to school (all three of us are in the same class) visibly upset. Whenever I ask Niya what's up, she dismisses the matter like "Oh, nothing, Dave and I had an argument over some dumb issue again". And she never tells me any details unless I press, and I hate pressing... Meanwhile, I sit near Dave and he usually gets even more visibly troubled than Niya. On a particularly bad day, I had caught him alone and he confided in me that sometimes it just felt like he "is trash, ready to be discarded at a whim".

I can tell Dave trusts me, because he often shows me bits of his arguments with Niya that they've had on Facebook or Line, and as of late, I usually have to ask him in order for myself to make any sense of their situation. There's pretty clear evidence that Dave's been trying all he can to communicate with Niya during and after fights, but it everything he's shown/told me, she's usually dismissing him or playing passive aggressive.

Once she even told him that she was really sick and tired of him. Her words clearly referred to Dave, and not the matter of arguing or whatever other problem they've had. Another time, she told him that he was a horrible boyfriend because he "didn't know how to charm a girl". Sometimes Niya gets physical and tries to pants Dave in the hallway. She tells Dave to basically man up and says "some people have it worse", when he's upset or gloomy.

Dave's told me time and time again that he just feels disposable in the relationship, but he is still adamant on continuing a relationship with Niya. He claims that he "loves Niya", but to most outsiders, including myself, it just kind of seems like infatuation. From what I see, the only one doing the loving is Dave; whenver they are in public or in school, Niya is almost always teasing Dave, sometimes to a cruel extent.

I've confided about this to a mutual friend of ours, but I felt like I had to spare some details, and so my point never got across. I've been in an abusive and manipulative relationship before, I feel like I know at least some of the signs. And lately, Niya's behavior and her interactions with Dave have made me uncomfortable and awkward to even be in the same area as them.

Our mutual friend, just based on what I was willing to tell her, thinks I'm overreacting and that I'm going to come off as meddlesome. I'm aware that, yes, maybe that's the case. But I'm super concerned for the well being of my friends and their relationship. I don't want them to waste years on a single life lesson, like I did. But I don't have the guts to call Niya out. I don't have the guts to shove the ugly truth into Dave's face.

With the way they are now, I already feel so helpless since they're both my friends to some extent. But add the possibility that I could just be worrying and/or meddling in something I shouldn't, and now I feel worthless. I can't solve anything unless at least one of them is willing to listen, and it's hard enough communicating with Dave about these issues, let alone Niya. Maybe i beat around the bush too much...

But well, I just want to know, am I being meddlesome by letting their romance affect me so much? What should I do about this, if anything at all?
I really really would like honest answers, words of wisdom, recounts of similar experiences, whatever you guys think can help me.

It's a difficult situation because it's one of those things you can't take at face value.

I would say stay out of it and if anything does happen let them work it out for themselves but be there as a friend for both.

Could just be that they're more open with each other when others aren't around and if it is like that and you did get involved and say something then it could all come back on you and then you'll be the bad guy if they brake up because, lack of a better expression, you were the one poo stiring.