DEAR ABBY: I have a neighbor who lives across the street. She’s in her late 70s. We’ve been friendly until recently, when she came to visit with me for coffee. We talked about many different things that day. She had brought me a present and homemade cookies, which was nice. When I mentioned something that apparently she didn’t like or believe, she stood up, announced that she didn’t come over to feel “uncomfortable” and left in a huff! I emailed her and sent a handwritten apology, but she hasn’t spoken to me since. What should I do with her unopened gift and cookies? I don’t feel comfortable a…