Was this rude for my friend to say and then do?

Maybe she's just jealous that you're becoming close with Rachel or something along those lines. You shouldn't be mad, but you have a right to be somewhat upset. Why don't you just confront her when you hang out. Ask why did you get mad about the Rachel thing and listen to her response. After that, ask well why did you hang out with Rachel after you were rude to me about getting her a gift?