Hello. Is there any reason you feel like you will throw up? Are you sick? Because if you are, you can just politely decline to eat and just attend the party.

No I am not sick, it's just I can't eat out whenever I have to eat in front of people I feel like I'll throw up I didn't actually throw up but I feel like it there is always a limp on throat that is stopping me from eating with people

Is it anxiety? For an immediate solution, you can maybe tell your friend you're not feeling well and only have something light or a small portion of the food available. But for long term, you need to understand why you actually feel the way you feel. do you feel that people are looking at you eating? does that make you nervous? what is it? You need to understand the main problem to get the solution. For now, say that you're sick and will only eat something easy on the stomach. Take care.

Thanks for your suggestion

All the best. Try not to think too much. They're your friends so they'll understand.