Ok, this story is a little bit complicated. But I dont know what to do?

Hmmm. I sense abit of jealousy here. She's most likely just scared that you will leave her behind as a friend and forget about her. Maybe some way you could convince her that you still love her as a friend? Maybe just plan a day for you two to get together. You two could go to the spa or something. Or just chill and watch a movie. But if she still has issues with your boyfriend after, then you confront her about it and ask her why she's so angry over it. (: