Why do I feel sick every time I go out to eat with my gf?

Sounds like anxiety. Mild nausea and loss of appetite are something that I deal with on a daily basis. If you are happy then it could just be nervous excitement, like having butterflies in your stomach.

Go to the same restaurants at the same time under the same conditions (i.e. how recently you ate another meal, day of the week, the weather, etc.) but with a different person and see if you still feel ill. Vary the conditions until you find one that correlates with your illness. Then try altering that condition.

If you feel ill under all conditions then see a doctor. In fact it might be good to make a doctor appointment anyway.

Are you just really nervous about being on a date?

It’s called an anxiety attack. Talk to a therapist about it.

It's because you're pregnant.

But on all seriousness, some say that there are cases when the would-be-father also feels nauseous with food when the girl gets pregnant.

Maybe she's poisoning you to get even for not asking her out earlier.

Anxiety?

If that tiny idiot of an amygdala in your brain thinks you're in danger then nausea can be a symptom.

This happened to me as well. I'd take a few bites of a meal and feel full/ nauseous; Sometimes even throw up. It went away after maybe 6 months of dating and we joke about it now 12 years later.

We chalked it up to nerves, but no one can tell for sure. Best of luck OP! Guessing you really like this person.

Maybe she's poisoning you just a tiny bit at a time. Kidding, but have you guys eaten a meal at home together without you feeling sick?

Allergies maybe? Most women use special makeup for dates. It could be something she's wearing like lipstick. It could be something in the food like peanuts or olive oil.

Try cooking dinner at home together and see if it happens.

Perfume?

Are you reacting to her perfume? Maybe she didn't put it on when you were just friends.

Maybe there's something you need to get off your chest. Maybe you feel like you're not being true to yourself.

If you feel like something needs to change in your relationship, better to put it out there and work through it than keep it hidden.

Anxiety is a possibility, even if you aren’t actively feeling it. This is a good opportunity to seek help from a professional, even if it’s nothing related to that.

probably due to inflation and the price increase 🤷🏻

Does she chew with her mouth open?

Stan?

Edit: It was a South Park Stan + Wendy reference, but I get the Eminem one too.

I have a similar issue sometimes. I feel like I get overstimulated by smells in restaurants.. Also I'm lazy so I eat boring food at home, so maybe the variety contributes to the nausea.

Also I'm celiac, which definitely doesn't help.

It's possible they changed their recipe to include something you may be allergic to or it's a new allergy

If this is real, it's absolutely fascinating :)

Placebo effect?
Maybe you got a touch of food poisoning one of the first times and now you subconsciously associate it with date nights?

Does she stink?

You've known each other for 3 years? Wow that's cool! How long did you know you liked her?

I don't have an answer, but congrats on being one of the few to break that friendship zone barrier

Ok, that helps. Still I think to look at what happens just before might help.

Restaurants don't serve food. They serve drugs that are intended to hook you and make you come back, not nourish you and keep you healthy. It could just be the cumulative effect. People who eat poorly get worse and worse over time.

I think every large establishment that serves food to the public should be required to serve food that a person could eat FOR EVERY MEAL and be healthy.