People telling me I’m overreacting when I’m being left out by my friends?

I rang my parents just to talk about how I feel hurt that I feel left out by my friends at university. They keep hanging out without me and not inviting me to stuff and I guess it just makes me feel a bit alone. It got to a point where I was crying to my mum over the phone I couldn’t help it. My mum basically said I’m overreacting and that there’s a war going on and I’m being “a twat” and that it’s a non-issue. Is she right? I get there’s a war which is way bigger than any problem than I could have, but I can’t help feeling sad about this. Am I being selfish for feeling sad?
People telling me I’m overreacting when I’m being left out by my friends?
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