Invite or don’t invite

It all started his sophomore year of college. Keep in mind I’ve never met his friends partner nor talked. She wouldn’t let me add her now husband on anything but she could have my man on everything. I couldn’t text her husband but she could text mine. One day I text her husband because my fiancés phone wasn’t receiving my calls & I was worried. He screenshots and shows her and she flipped out and message me on IG and told me to never text him again. I was in shock & honestly wasn’t my best but apologized. She then blocks me & has her husband do so on everything as well. Fast forward a year she unblocks me on everything. Then I post in my IG story a quote. ( I love quotes) For some reason she assumed my post was about her. Then she & her husband block me on everything for the second time. Year later They get engaged. My fiancé was supposed to be a groomsman but refused when told I wasn’t invited because of his friends wife. (Proper etiquette rule is you can’t tell a party member who they can & cannot invite) Months later she messages me on IG and apologized for holding a grudge ( still don’t don’t about what) invites us & says since she’ll be living with her husband & doesn’t want things to be weird when I’m in town. (The boys were finishing college). I accepted even though I had a weird feeling. I was excited and happy. Got them gifts & went to the wedding. When I came into town I always invited them to join us out and invited them to a Christmas party I planned for all my fiancées friends. I was there when she lost a family member & got her a gift. I was always generous & kind. I was putting in effort while she wasn’t. I’d always catch her lacking eye contact or uninterested when I talked. Often on her phone. She would give fake smiles to me & give a strong look into my eyes. I would get a gut feeling. Then again she assumes I was talking about them but this time it was me expressing my opinion on my IG. She message me and ask if it was about them. Before I could reply she blocked me on everything again. My fiancé lived with them at that time and told him I’m not allowed in their home because I make her uncomfortable. (We were doing long distance) so when I visited we stayed at his other friends house because we didn’t have money for a hotel. Now I’m engaged I’m not sure to invite them or not. She has no respect for me & full of negativity. What do I do? Sorry that was long.