hey... um can 你 help me with this?

Calm down first off. Take some breaths , you're going to live through this.
I was in a situation not to long 以前 where something like this happened. Rumors were going around school like crazy. It really hurt my feelings, but honestly after a few weeks nobody cared o.o
Whether this guy is spreading rumors about you, 或者 just talking shit, i wouldn't let it get to 你 too much cause im sure thats just what he wants ..
don't worry yourself to much thinking everyone knows everything about you.
Im not very good at giving 建议 but i think 你 should steer clear of him for awhile until he cools his mouth down, then possibly sort things out? Focus on school first then drama. Again idk if this helped 或者 not T.T i don't usually give 建议 out, but if the problem continues DX feel free to 收件箱 me about it! Just rant your feelings. listening is something im good at :)
Good luck and i hope it blows over fast

well what 你 have here is known as... retaliation... it is a thing that i know way too much about... ya see when 你 blocked him he decided that 你 broke the trust first... then decided that since the trust was already broken might-as-well spill everything... he probably was thinking in the 'heat of the moment'. if 你 want my 建议 (and trust me ya don't... 你 should never take 建议 from people over the internet...) 你 should A. unblock him and B. call him out and ask him... get the straight answer, tell him about all the trust 你 had in him and how HE broke it... that would probably make him feel guilty 或者 bad about what he did and if it doesn't... at least you'll get an answer...