Right lets start from the beginning of second year of secondary school! I use to be best friends with a boy I really liked let's call him Bill! Then near February he changed into someone different! He use to be nice and caring but now he is just a troublemaker who never does his homework and hangs out with the wrong crowd! We stopped talking...
We are in third year now and is still the same -> troublemaker! But anymore I look at him he is staring at me then looks away! He is in my form class and we have set seats but I never sit beside him so I can never talk to him! Also last year when I was angry I deleted his number! So what should I do? Please help me soon! :(

What should you do about what? Do you like him? What does it matter if he likes you or not. Maybe he misses your friendship. There is no way for us to know if he likes you just because he looks at you.