My Final Grade In A Fall Course Is B+ I Am A Bit Disappointed.

I checked the  university website my final grade is  B+ for one full year fall course.  Of course, I know  B+ is a very good mark. I am just a bit disappointed  because I tried so hard I wanted an A. The fall course was very intense, two lectures a week for six hours and tons of readings. I wonder, why did I return to university to work on a second B.A. degree? B+ is a good mark but I am not happy right now. I am glad tomorrow is my day off from school.