Yes I'm still on Terran but I sincerely hope MC is able to love his other harem members. As before the bond he never learned to love.Of course. Never underestimate the peril of unrequited love.But I also think the changes he will undergo from the impact of his bond with three beautiful women is, potentially, the most significant internal conflict for the MC. Especially given his closed emotional nature which you so aptly point out.
Edit: I also think we would agree it would be a mistake to underplay this aspect of the MC's character.
But due to the bond and the cracks it has made in his cold self maybe he can learn to love them.
It's feels sad to see him bang em but not love em. Though as sad as it is I still gotta see them scenes xD