i feel conflicted. About a possible guest.

Why does this women dislike me? But, like my partner? She is married to my partners friend. It’s all started when I expressed an opinion in high school. They were all in college. which she verbally attacked me and blocked me. I couldn’t talk or add her man on anything but she could add mine or talk to mine. (Hint: I never met her at the time.) A year later she & her man unblocked me and they both followed me on IG. I had a spam account which she only followed. I expressed how I felt about mean people and she assumed it was about her. Then blocked me and told her man to as well. Then he started to act weird and rude to me. I was simply talking about something I saw online. A couple months later they were engaged and my partner was asked to be a groomsman. He refused to go if I wasn’t invited. Which if they knew etiquette. They would know that’s wrong. One night they all went to dinner and she randomly messaged me and invited us both and said we’d start on a clean slate.( She holds grudges if you couldn’t tell) A half. Year goes by. We’ve invited them to do stuff with us, invited them over for dinner and I was there when she lost a family member and check in when I heard she was in a car accident. My partner later moved in with them and I came to visit him. (We did long distance). She started to act weird. She didn’t say hi to me and kept talking to my partner and started at him in the eyes for a long time. Which he even said he felt weird. She kept talking about what they watched and a joke they had. I started to feel uncomfortable. I then left a couple days later and I had a family member that wouldn’t leave me alone about money. I then make a post saying you can’t ask someone for money if they don’t have job. In which yet again she thought I was talking about them. This time she asked me and when I told her I wasn’t. She didn’t believe me and then called me names and brought up the past and irrelevant things. She even brought my partner into it which made me mad & tried to threaten me by saying she wouldn’t ever unblock me again and that I can’t not invite them to our wedding. Which I didn’t even say anything about that and I wasn’t being rude when replying to her. I felted attacked. I was blocked again but this time not by her husband. Next day I got a long text by her and again wasn’t nice. I waited a couple weeks then replied when I was calm and told her thank you for letting my partner stay at their home and wished them the best in life. Her reply was I don’t need to thank her I’m not his mom and my text was unnecessary and good night. I then told her I was just sharing my appreciation and there isn’t any reason to be rude. Months later she requested to be friends with my partner again. In which he declined. I don’t understand her problem and why she creates drama over the smallest things. She’s smart, beautiful and has a loving partner. Should we invite them anyways? I don’t want her there but her husband is my partners friend.