Sigh, For people saying the uke is the issue I am sorry but you need to get this on his pov.
They were in a relationship for years and he ended breaking up with the seme because of miscommunication. Yes that was his fault.
He now matured and was very clear about his feelings. He communicated that he longs for the seme who we clearly see is the one with communication issues.
Now I cannot judge him ( the seme) as the reason for his behaviour has no been revealed, but this topic is being addressed realistically. This are two different personality types and if communication were to be that easy, don't you think all relationship would fly? This relationship is being built, as per now they are entering a deeper stage of breaking new barriers and strengthening their bond..