i bought this manga two months ago and i really liked reading it but the ending was a litt...

i bought this manga two months ago and i really liked reading it but the ending was a little disappointing !! i mean there are a lot of things that didn't get resolved yet
they still didn't declare their love for each other
what about his father , did he manage to cure him or not ?
and what about his brother as well , what happened to him ? and will he take revenge on his brother ?
there're more events to come so why did the author decided to end it here ?
i really hope this manga to be continue in the future