Nausea

I am skinny and couldn't gain much weight in last 8 years. I tried eating a lot many variety of foods, tried Yoga, exercise, medications, but nothing helped. The problem later I could think of is not the intakes, but the acceptance. My mind does not accept the food. I cannot go out to eat lunch or dinner, just because I feel nausea. This happens 9/10 times to me.

If there is a chance that I have to eat out, I vomit just before going out.

If eating food is the reason of going out, I cannot eat much if it is large gathering and I vomit if it's just my friends.

I can only eat with the one I am most comfortable.

I do not go to relatives because I cannot eat much in other people's house due to uncomfort.

For everything where it's food or any decision making, I feel nausea and suddenly vomit.

The only reason I don't do outing is to avoid eating less with friends and vomiting in front of them.

I don't know how to overcome this