It's hard to rate this series, because:
The "bad" guy left the "good" gay to have a "normal" life, but when the "bad" guy is getting married three years later, he comes back to the "good" guy...
Is that realistic? If I were the "good" guy I would have moved on long ago.

In this story the "good" guy did not move on and is still yearning for the "bad" guy and as it happens they end up together. But not with some drama in the end where the ex-fiancé is threatening the "good" guy as in outing them and legal action and telling him seeing two man together makes her puke.

So this is not a happy story and the homophob ex and the selfish "bad"guy are a big minus for the story. The execution and acting was very good and a big plus. And after you have watched it, you will have a bitter taste left. So I guess, this short series was well above average, even when I don't like such stories.