need advice urgently

my ex (18M) broke up with me (17F) a few days ago. it was very sudden. he was always the kind to ask to work things out and not run while i’d try to be avoidant. we had miscommunications and disagreements just like any other relationship but we would always talk them out at the end of the day. he had started telling me he felt drained and i did try my best to go easy but i had my moments, i’ll be honest. on the day of the breakup, i had been mad, or more so hurt, because it felt like he was unhappy and i asked him about it and he said no. upon insisting he said he thought we had rushed into a relationship. which hurt at that moment. so i said i won’t bother him. he said no, hard conversations hurt but we need to have them and that we can’t just leave. and then suddenly some switch went off and he said he had lost interest and broke up.
i am friends with his best friend. his best friend says that’s just a bullshit excuse and he is being impulsive and self destructive because someone who loses interest doesn’t sit crying over it. my ex later sent me a paragraph basically saying he was sorry and he realises he is hurting me but he doesn’t feel well mentally and that he knows it can be fixed but he doesn’t want to. he then said he hopes we reconnect in a few years. all our mutual friends say he is suffering too and he is just in his feelings right now and is being impulsive. and he will realise later.
but i don’t know what i am supposed to do. do i wait for him to realise this isn’t the way or do i wait for the years to pass or do i move on forever.
the thing is, he never gave up on me everytime i tried to run away. i can’t just give up on me.
and please don’t say you guys are young, you’ll meet someone else. this was actual love. you have no idea. please just advice me what to do. do i reach out? do i wait? i have been incapable of eating since the breakup, i have lost track of what day it is. it feels like i am losing my mind.
sorry for making it so long.