Believe it or not, I think the latest chapter (28) was revised. When I saw the raw, he literally just walked out on her. The dialogue was a bit different. So, they made him a little less of a jerk.
One of these days, there is going to be a web toom where the ML loses his memory and just abandons him for the second ML.
And then we all point and laugh when first ML remembers, but FL is already preggo by second ML and he regrets being subject to third act amnesia cliche.
Now I'm starting to hate this guy