Uncommon allergy - please help :(

(Quick summary: I'm likely allergic to my partner's pheromones and the only thing that helps is taking unhealthy doses of corticoids. It's exclusively an eye allergy but serious enough to affect my daily life. I'm looking for info, tips, anything that can help)

First of all, I've never had an eye allergy before, and this situation i'm about to describe exclusively happens within this context.

I've been with my bf for 3 years. Since we met, I've been getting an eye reaction, which includes redness, itchiness and yellow/white secretions. This wasn't as much of a problem at the beginning because we were long distance. As we started to spend more time together, I noticed it wasn't as bad as it was at the beginning (e.g. having less secretions). But it would get worse the more days in a row we spent together, so in the end the symptoms were the same and lasted longer.

We tried everything to see if it was a particular product, item of clothing, etc. But I had the same symptoms every time. He came to my house, wore my clothes after putting his to wash, only used my products (shampoo, deodorant, etc.). We've spent time at the beach while only wearing his swimwear. We don't share towels. Im not allergic to latex and we don't get intimate every time we meet. I get this in every setting, house, weather or environment, regardless of clothing, products or lack thereof. The only difference is that it happens less outside than in closed spaces. I've also tried cetirizine; if it works, it's pretty much unnoticeable.

I went to my family doctor the first time it happened and she gave me a corticoid cream (Terracortril). It worked well and the issue was gone within a few days, but she said to only use it twice a year.

When I realised the issue wasn't a one time thing, I went to the social security eye doctor, and she told me it was my cats (my boyfriend and my cats hadn't even met - this only happened when I was AWAY from my cats). She told me to buy some eye drops and cleansers that did nothing.

I later went to a private eye doctor. He mentioned that it could be component of my bf's glasses, but we'd already tried taking them off for a day and it didn't work. I asked if it could be my bf's pheromones and the doctor said yes, though he'd never seen it happen and it's quite rare. He prescribed eye drops (Softacort) with corticoids that aren't as strong as the cream. They worked but he also said to not use them for long periods of time. He also said that my allergy would dissappear eventually.

However, bf and I moved in together a month ago and it's still happening. While I don't want to use the corticoid drops for a long time, I don't know what else to do. I've tried exposure; not using anything on my eyes for the whole month, but it doesn't seem to be getting better.

Does anyone know anything regarding this kind of allergy? I'm really curious to know if it's happened to anyone else. Most importantly, does anyone have any recommendations on what to do... allergy products, tips, anything? The only thing I can think of is sleeping with the door open and opening windows to ventilate throughout the day (which doesn't do much either).

I'm not knowledgeable on allergies except skin stuff which I treat with creams, so maybe there's some solution I'm missing?

Literally any info would help, I'm pretty desperate 😭