My friend hasnt spoken to me in months....?

my friend stephanie liked this guy named Josh who had a crush on me. i had no clue of all this till a mutual friend brought it to my attention.....thing is i was crushing on the guy as well. anywayz Steph found out and she said he doesnt like me you should go out with him. i wasnt going to but she kept on about it so i finally said ok i will go on a date with him so i did and we hit if off and we dated for a while. She got soooo pissed at me and hasnt spoke to me. WTF?? im now engaged to my guy Brian and its been over a year ago that it happened and she barely speaks. after all that she got mad at me for it. what do u guys think of the situation?? was i in the wrong or was she in the wrong. thnx