Yapping {ventish} !CRINGE! if you have any help HELP

I feel like complete crap

I'm going into grade 9 and in the school i go to that's second year of high school, and my friend is going into 8th year and she is just getting back from the hospital (cancer) and i was showing her around the school and i showed her when me and MY friends sit and she started talking about how her and her friend are going to sit there, btw it was already starting of rough because i  though it was just going to be me and her but her friends were there and that was annoying because there annoying and i kida wanted to spend time with her but whatevs THEN OMFG after i showed her around SHE DICHED ME and i was talking to my mom about all of it (crying) she told me i was overreacting and took her side like she always does. and im like breaking down so if anyone can help me it would REALLY help.