The seme doesn't deserve him at all. It's so annoying. It's on Sakasaki's terms that their friendship ended (and the MC got cheated on), it's on his terms that the MC can't seek him out to talk, and now it's still on his terms that they can talk again because now, he wants to know something. He never tried hearing the MC out despite being the one who did something to hurt the other. They were friends. Even if the MC doesn't like him, he still deserves closure for everything. And the MC is still the one trying to reach out here.