Upset friend

I think my friend mad with me about my gender reveal, I called her and told her and she was like, “Oh” . Tbh I really wasn’t trying to be rude about hiding the gender. I only did it because her fiancé he likes to talk and I don’t want him to tell his mom because then, she would tell the family. 😌 tbh this friend has been rude to me about a lot of things ,but I always still put a smile on my face for her and still be very happy for her. I was supposed to be the maid of honor for her wedding in October ,but we got into an “argument” that I wasn’t even aware of the argument because she called me about something and I told her I was unaware of it. Then, hung the phone up. Later, when we was trying on dresses her mom asked her about the maid of honor and I said me. Then, she was like another girl is the maid of honor. Mind you I didn’t get mad with her, I didn’t curse her out, I didn’t block her out my life like she does to me when she is mad. I was a good friend and let her do her thing. I feel bad because she did sound angry with me on the phone. I hated how she just said , “Oh” to me. I’m always congratulating her on anything she do, even if it was something I didn’t care about or made me upset.