Sharing Our Innermost Thoughts

So i was in a relationship with my classmate[lets call him KT],a few months back KT broke up with me,KT had liked me for 4 years now i am in class 10 and KT liked me since we were in class 6 we were like good friends and everybody used to tease us with each other but KT acted like he didn’t care. he never had the courage to tell me until i got into a relationship with another guy in class 8,KT was so freaking jealous,he’s jealousy was visible in his eyes when he used to see us together, that year in class 8 we were given a project exhibition,we had to be groups of five members,so me and my two other best friends including KT and his best friend,we decided to make one group,during the project we became really close ,i mean as friends,he is a good guy with great sense of humour,so after my break up KT proposed me in class 9,i didn’t wanted to say yes ,but due to lot of pressure i had to tell yes,he really cared for me and my feelings started to take a different way towards him,but one day [during the corona lockdown]suddenly a boy texted me who was KT’s brother[not by blood]he was a nice guy and was 3years older than me,we really got alond quite well,and we became close over texting,but that relation was just a relation between a brother and sister,he saw mw as a sister and i saw him as a brother,and he was already in a relationship for 1 year,we used to talk in instagram and KT and i had exchanged our instagram passwords and i trusted him so i didn’t changed the password while i used to talk with that boy,and suddenly one day KT started talking to me very rudely and broke up with me,i was so shocked ,he didn’t even tell me the reason ,i asked him so much but he ignored me,then after some days i came to know the reason KT thought that the guy and i liked each other ,he thought i was cheating on him,he did not even confronted me or him,then after 2 months KT texted me saying hey but i ignored him,after our schools reopened he didn’t even talk to me and neither did i tried to talk to him,but he used to steal a glance of me during classes,my friends used to tell me that he was staring at me the same way he used to stare at me before we were in a relation,then one day recently over texting he apologised that how wrong he was about not trusting me,that oyher boy told me that KT still loved me and wanted us to be together,i don’t know what to do because for a relationship love is not the only thing that matters,trust is the basis of a healthy relation he may love me truly but i don’t thinks he trusts me but on the other hand i might not love him as much as he loves me but i used to trust him more than anything

can you guys please suggest me what should i do?
i am really confused should i just move on or should i be stuck with him