its weird that he found out your password, other than that.
Everything seems normal, he must be insecure or he wouldnt
be wanting to know what your writing in your personal journal.
let him know that it isn't okay to invade your personal thoughts and more importanly your trust for him is narrowing...id let him know that if he does it again, there are going to be problems!
CHANGE YOUR P.W.
in order for this to never happen again, stop writing in your online
journal, hacking these days is like slicing a piece of pie....So
id start writing in a keep sake place, like a spiral...