She's bossy and it's killing me.

My girlfriend is the most bossy person I know and everytime she tells me what to do, my love for her slowly fades. I love her genuinely--- it isn't something questionable. But her attitude is very suffocating. I sometimes don't feel that she's really loving me coz it doesn't seem like it. One time, I told her I'm breaking up with her because I can't handle her anymore. Yet, she said she will kill herself if I leave her. I don't know what to do anymore.