It's not even close. Less than half the things I can understand, but 2/3 of things said I will have a problem understanding. If you come across any bulgarian they'll tell you ahh yeah it's just a bulgarian dialect, but in reality Cyril and Methodius were macedonian, born and raised there, making bulgarian actually a macedonian dialect. Slavic languages basically came from macedonian.
But hey, we were beaten, occupied, stolen from, and thrown in the garbage, and we all know that only the winners (stronger ones) get to write history the way they like it.