I have experienced something similar, however the guy and me today are really good friends still. I think it all depends on how the other person actually comes to terms with the fact that it doesnt make any sense to pursue further "if" the other person is just not into it in any romantic way...
Sometimes its just meant to be platonic and no matter the persistence its just time that brings a person to terms.. being stalky , quirky and all over the place can be suffocating if the other person is just not into the same space!
My guy friend and me were practically like Siamese twins! We used to study together.. play basketball together..basically do umpteen activities like any other teenager together. discussing books, music, fashion, crushes etc was so not out of the norm.. eventually through the years , this guy friend of mine openly confessed that he had feelings for me ..and he felt that we were just perfect.. Well that's where the problem was, I was just not into it and he mistook the care , mutual feeling of ensuring that the other was doing okay as Love! At first I was a little shocked, infact I remember shrugging it off saying its just a guy thing.. you know how friends do.. but eventually those words and the romanticizing of everything increased.. it felt out of place for me..and it took me a long time to make him understand that.. he eventually did because he knew losing my friendship was way more costly than giving up on his feelings..plus it wasn't ever meant to be.. he met someone amazing and actually the three of us are pretty close today! Probably because somewhere I understood where he was coming from it never really annoyed me as much as it did hurt me to see him constantly badger around the same topic. It took a while , but he did realize that we were perfect as "Dost","Yaar" but and not have any "pyaar waala pyaar"..lol!I didn't feel annoyed because I knew him pretty well and somewhere I just wanted that I have to get him out of his trance by being just normal without any emotional blackmailing..I wanted it to be a natural progression and give it time for it just got over.. we call it our years of growing up :)! He is like family now, where my mum talks to him than me..haha!
If someone were to do crazy foolish things .. or just go mad , berserk or borderline crazy.. I would be concerned and it would possibly not end well if I'm not into him in any shape or form!
Coming to adiya.. I just feel that because Adi is confident that Zoya has feelings for him.. is precisely why he is pursuing it further plus he doesnt want her to SETTLE for anything now.. He has seen her through her lowest and just wants the best..