beta
It is kind of sad him realizing things like getting a hobby and stuff and knowing other people beside his BF but he can't even pursue it because he don't want kazuma to be jelous or anything. Hoping he realized that pursuing his personal interest and wants is also important.It is okay give all your love but you should leave something for yourself and that is self love.
And to the seme or any guy. Why can't just be honest with what you are doing ? Specially this seme he has baggage and a things he did not open yet to kazuma.It will be easy to misunderstand.
I can't blame the uke for getting hurt.