hey... um can 당신 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 이전 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, 또는 just talking shit, i wouldn't let it get to 당신 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 조언 but i think 당신 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 또는 not T.T i don't usually give 조언 out, but if the problem continues DX feel free to 메시지함 me about it! Just rant your feelings. listening is something im good at :)
Good luck and i hope it blows over fast

well what 당신 have here is known as... retaliation... it is a thing that i know way too much about... ya see when 당신 blocked him he decided that 당신 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 당신 want my 조언 (and trust me ya don't... 당신 should never take 조언 from people over the internet...) 당신 should A. unblock him and B. call him out and ask him... get the straight answer, tell him about all the trust 당신 had in him and how HE broke it... that would probably make him feel guilty 또는 bad about what he did and if it doesn't... at least you'll get an answer...