Welcome to the forum!
So, I read all of your posts, so you have Celiac disease and a wheat/soy allergy? That is definitely a lot to deal with. Having the actual wheat allergy on top of Celiac disease definitely complicates things. While there are some people with Celiac disease who feel they get ill from just walking past the bakery at the store (you can converse with those people exclusively by using our super sensitive section, which I recommend for any other airborne conversations), the majority of Celiacs do not have symptoms to that degree, since gluten has to get into their mouth to cause a problem. So while a person with Celiac disease can handle, say, a piece of gluteny bread, and wash their hands and be fine... someone with a topical wheat allergy obviously can't. Do you live in the US? If you don't, go ahead and put that on your signature line (along with something saying you have an actual wheat allergy) so we can tailor our answers to you. Most product info here on the board is for the US, although we have a good number of Canadian and other international members who give great information.
Not being able to participate in the societal norm of having food-based gatherings can be a huge drag on your life. My family is the "Omg you need to eat something!" type and even though they mean well, I know they feel a little slighted when I leave the gathering early to go home and eat. A lot of us will bring our own food to things, but given how severe your allergy is, that may not be the best option if you can't even go somewhere. But if there is a place you do feel safe going, bring your own food and don't apologize. I actually keep a doctor's note for when I go to places where outside food isn't allowed in case they give me trouble.
You just have to create your new normal, invite others in, and sadly, leave behind those who don't feel the need to do simple things to not make you sick. If they aren't willing to do something so simple to avoid hurting their friend, then they aren't a real friend after all. Leaving behind old hobbies and having your life flipped upside down by illness can be a very bumpy ride in life. Some of us here have talked with counselors to help cope, especially when friends and family are extra isolating, other illnesses are involved, and depression sets in.
I actually understand the mask wearing thing. I have a Primary Immunodeficiency disease, which means I naturally lack part of my immune system. If there is a flu going around or I am someplace with huge crowds, and when I fly on airplanes, I keep a mask in my purse and sometimes wear it to protect myself because those germs get to me much easier than the average person. People will freak out and be so rude, so I only wear it if I feel it is absolutely necessary. Luckily I work from home, keep my distance from strangers, and don't do it very often. Especially when the ebola thing was big news, so many ignorant people out there I wouldn't dare wear it even though it was flu season. LOL I don't get out much, either. Haha.
Moving away from your current area may be something to put off for a while so you can maybe work on trying to increase your level of happiness so you don't end up isolating yourself and increasing levels of depression. However, if you feel that your immediate area is a source of stress and illness, then definitely get out of there. I am around the same age as you, and I also understand the difficulty of avoiding comparing yourself to other people, having to give up a successful, lucrative career in the medical field that I worked so hard for. Remember that their relationships, jobs, and families that look perfect from the outside are causing them to probably be stressed out, that there is a 50% chance they will be divorcing, and their kids are not the perfect angels they make them out to be on social media. Try your best to learn to love yourself and your imperfect life, and be grateful for what you have and what you can do. That, of course, is a struggle on a daily basis, but if you can increase the number of good days and decrease the number of bad days, then that is winning