If you are not romancing two characters and they end up hooking up with each other do you approve or disapprove? Is it just jealousy because in a previous playthroughs you romanced one of the said characters? Or is it just some weird thing where only you want to be the only one allowed to romance?
It isn't about jealousy for more but more about OTPs. I get really obsessed with OTPs, not just in video games but in other things, too. Sometimes I can't even look at fanart or read fanfiction that depicts one half of my OTP with someone else.
So for me in DA2 my OTP is M!Hawke x Fenris. Hence FenBela just drives me up the wall and sends me into a frothy rage
Of course, another aspect of this is whether or not I feel the pairing makes sense to me. FenBela does not make sense to me, at least not for Fenris' character.
That doesn't mean someone else can't come behind me and say, "But FenBela makes perfect sense to me!" and they'd be perfectly right. Hell, their own WRITERS clearly think it makes perfect sense. It's all about how each individual player/reader "reads" the character.
If I don't have an OTP, and the pairing makes sense to me, I'm fine with it. Hence I'm fine with Garrus x Tali. I will say that I wouldn't have minded a little set-up on that one, as they hardly seem to even talk before this. The two engineers were handled much better (then again, neither was a romance option). Garrus x Tali seems like the writers just put two names in a hat and those were the ones they pulled out first.