Whats wrong with me?

OK, In september I took contact with My biological father Idar(I live with My kom My steph farger I usually call him dad and My 3 siblings) , after I added him on facebook he gave me a loooooooong letter about how Much he'd missed me.( he last saw me When I was about 7 months).Our conversations as about me, him, and we just godt known to eachother. Now he blocked me on facebook and Im so irritated, sad, angry and so man ny questions is running throug My head.
"Why did he"
"Did I say something?"
Right now i miss My knife, but I have hid it on the attick,(My little sisters room is under the stairs so I can't get up).