My boss is making me redundant. Read my story.?

I am an accountant (29 yrs old ) with a middle sized firm reporting to one senior finance manager and with one junior accountant under me. I hold full CPA qualifications, has a Bcom (finance) degree and an MBA (strategic management). My senior has CPA and undergraduate in Business management. Since i took up the MBA course, my boss changed his attitudes towards me. He has been "by-ping" me on all issues instead willing to share with my istant though we are in the same office. Recently we agreed to streamline our workflows and so we agreed on more delegation and training. I went ahead and delegated most of day-to-day work to my istant hoping that my senior would release some of his tasks and responsibilties. i was shocked since he never did so. I feel in a vacuum, more of a "just be there and earn a salary guy" than adding value. I feel this is a deliberate move to lock meout , hijack all projects and portray me as Redundant to my directors. What should i do now? Thanks