
The thought about marriage can be scary for some people. If I were an omega, meeting my "mate", a man I don't know and who says that he wants to marry me, I would have run away fast too. Because accepting a partner brings changes, and whats important here, it limits your personal freedom/space espacially for an omega. The fear of bonding is nothing unnatural. Could the uke be nicer? Yes. But remember, people react different to fear. At first, the uke didn't noticed that he hurt the seme, and as he realised, he couldn't face him because of guilt. That's not a good, but often a common reaction, if it's about uncertainty and fear.
I feel also sorry for the seme. He was just too enthusiastic and scared the uke away. It's hard to fall in love with someone, that doesn't want to bond. It's a toxic combination of longing (seme) and emotional self-protection (uke).
While many people are criticizing the story for focusing on the second couple before the main couple is happy ever after, I like the variety. The second couple is cute and intersting and I think we all agree that the story is after all sooo damn good.
Your complaints are first-class whining. ╮( ̄▽ ̄)╭
EXACTLY. These people are so immature and impatient, there are yaoi that have been running for 10 years.