Why am I like this...

So for the past 4-5 years I can not eat at a restaurant...

When I go with my boyfriend, I order my food, but when it gets to me, I take a few bites, and then get super warm/hot and feel nauseous. I can’t eat anymore. I usually end up taking most of the food home to eat.

My boyfriend hates that I’m like that. He doesn’t even take me out to eat anymore.

I have googled it to see why I do this and all I can find is anxiety. But idk. It’s very strange and embarrassing.

When I have gone out with my boyfriend and his family, his family will point out that I don’t eat very much.

I try to eat a lot but I feel like I’m gonna throw up. And I don’t want that to happen.

Any advice ?

(I eat normal at home.)