Being around healthy people when you’re not

I have a few different mental health disorders and I find it a little bit hard sometimes to be around people who don’t have similar struggles. I find that they can’t always understand my situation, they’ll often tell me to “just stop thinking that way” as if it is easy. I just end up feeling like an outsider and like something is wrong with me. I just find it hard sometimes and felt like venting. Does anyone else struggle with this?