Had a bit of a breakdown today

Hi, so recently I've been stressed due to feeling like I'm out of control of what's going on in my life. I've also judt been feeling pretty anxious anyway, i was dealing with it pretty well up until today. I had just had lunch and i suddenly felt panicy and anxious, so i ran up to my room where i had a panic attack. I suddenly thought about how much everyone hated me and how unlovable i was, and i convinced myself that everyone was lying to me about liking me. I messaged my friend basically telling her that i was stressed out about something and i wanted to distract myself, i didn't want to tell her what was actually going on though out of fear that she would think i was even more stupid than i already was so i just diverted the conversation elsewhere.

I know that I'm thinking negatively because of my anxiety but at the same time i believe what my head tells me and i can't stop believing it. I also don't know how to stop believing it, I've tried looking in the mirror and saying good things about myself (e.g. You look nice today) , but it just feels like blatant lies.

I don't really know what the perpose of this post was, i just want to tell someone how I'm feeling without my mind telling me that they don't want to be talking to me.

TLDR: i had a bit of a breakdown today but i feel like i can't tell people out of fear of them hating me more than i already think they do.