Dealing with Nausea from Restricted Diet

I can very much relate to this. I don't get nausea that often as my symptoms are more cramps and bloating but the not being able to eat what I want is so depressing. And the things that I "should" be eating are difficult for me due to my ARFID, allergies and intolerances. It's especially hard when I'm with others who I see eat whatever they want, usually things I enjoy but cannot tolerate. It can send me spiraling into a deep depressive hole sometimes. I think I'm still in denial about HAVING to live a certain way.