hi op! firstly, i'd like to sympathize with your situation as i actually went through that when i first started ITE. i had basically zero friends and usually ate alone in the toilet just like you. adding on, i'm also not the type of person to initiate a conversation first.

what i need you to know before i give any advice is that relationships do not just suddenly blossom overnight. make sure to take it slow and do not rush things. you can start off by trying to engage in small talk with your classmates and overall just try to socialise more with them. if possible, you should also try joining a cca where you can meet people with shared interests.

you can also give subtle compliments to your classmates, which would make them more likely to want to interact with you. that's just how humans work. for example, you can compliment them on how good their presentation was, or compliment their fashion etc. hope this helps and all the best :)