Some context: I 20M, proposed to my girlfriend, 22F, a couple of weeks ago. My family is super loving and supportive of us, my parents and sisters came all the way across the US to visit us right before I popped the question. They were the ones encouraging me to propose, my mom and my little sister went with me to buy the ring. Now I've always disliked big ceremonies, especially if I'm the one being celebrated. I find it super awkward and I tend to have a lot of anxiety in those situations. My fiance is the same way, she told me she would hate to have a traditional wedding since she really hates being the center of attention. I was so relieved when I heard that since I was already stressing about having to plan and attend a ceremony. My mom was not happy, she said she was disappointed and hurt by our decision to just have two witnesses and get married through a court house. We figured it was the least stressful way for all of us since my immediate family lives on the east coast, my extended family lives near the gulf and my fiance and I live on the west coast (yeah, we're kinda all over lol). My twin sister is getting married in August and they are all busy making the plans for that, so we didn't want to add more to their plate plus the fact that both my fiance and I would much rather get married quickly and quietly. My grandparents have called me a few times and told me I shouldn't be hurting my mom by "excluding her" but we couldn't possibly include her in something that isn't happening. I've been torn about my feelings, on the one hand I really don't want a party or wedding ceremony and neither does my fiance and on the other I feel like I'm being selfish and I really don't want to hurt my mom. AITA?
TLDR: Neither my fiance nor I want a wedding ceremony, and my family feels hurt/disappointed by our decision.