Me too. He Tian is the most complex character ( because he is actually the most flawed of them) and that makes for promising character development. He is a good guy who does bad things ( his bullying on Mo and forcing him into doing everything the way he wants by threat ) . I see Mo development as mostly driven by He Tian. He is reactive to the other guy and always on defense mode. Since he sees He Tian as his bully he always welcomes the guy with insults first and goes on mode attack when He Tian is doing his worst bullying. However, as soon as he perceives He Tian in a vulnerable state he drops the defense and go softer. Unfortunately that only happened twice. He Tian is driving their mutual development and the kinder, less bully and more vulnerable he become around Mo, the more the other will let his defense down. Both He Tian and Mo need character development before relationship development because they are the 'wrong' guys, they are a combination of thug, bully, traumatized boys that need to overcome their own flaws in order to make their thing work. Xi and Jian on the other hand are already the 'right guys', sweet, good, cute guys -- and friends -- and therefore the development is about their relationship only. It's a long way for He Tian and Mo but I still hope this is a love story where they are each other's medicine -- He Tian learning that he doesn't need to bully or buy Mo's love out of him and Mo learning that not everyone is out to get him and he can trust He Tian.
The way I understood this chapter was that He Tian has always lost the things he loves...so he was making sure that Mo was still there. It's true that He Tian has wrong ways to show his feelings and Mo has his issues too. Thats why I think when they become mature enough they will be a good couple. In a strange way they compliment each other, but for that they have to grow up and get over some stuff from the past.