<human>: I found out about it when my friend texted me to mark my calendar. Asked my parents about it right away and they told me they'd agreed to it the weekend before. I told them that had anyone asked me I would have declined the invitation and since no one did...I wasn't going to attend. Now they're angry at me over it.

I'm not just being arbitrary. My mental health has gone to hell and I can't bear the thought of giving up my quiet weekend to have a noisy, loud brunch with my parents, my friends parents, her husband, and her infant. I can't tell my family that, though. They're too supportive of me, if that makes sense. They smother me with their concern and it really doesn't help.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Parents made plans with my friend without telling me. Now they're upset I decided not to go. How to I get them to stop being mad without telling them I'm not entirely well right now?