Why do I feel sick every time I go out to eat with my gf?
every time we go out to eat, I take like two bites and feel like throwing up, and I'm not one to get nauseous easily. this only started when we started dating (wed been best friends for 3 years or so up until that)
its not new food, I've been to these places many times before
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.