I think i miss my ex-boyfriend?

Out of all my exes i miss this one ex the most i dont know if i miss him or is it just a feeling. I met him through my other ex-boyfriend he was his best friend i got to know him, he told me he liked me and i started to like him, i started getting bored of my boyfriend at that time so we broke up and me and him got toghter, his sister however hated me she did not like me because i went out with a guy she liked , she calls me a slut which i am not at all not even close! he got infulenced by his sister and he started to ignore me he never awensered my IMs my texts so i decided to break up with him and he decided the same, later on hatred began to devolop in my mind i started to hate him for what he did , he went around and told people he never went out with me , i mean its okay for him to do that, but he doesnt have to lie. One day he IMed me and hes like why do you hate me so much and im like seriously go away hes like okay but im sorry if i did something and dont hate me ... i was like whatever. after all he did to me why would he do that does he still care, i sometimes see him now and then he stares at me and trys to get close to me i never say hi , or anything or even look at him.. WHAT THE HELL IS THIS I NEED HELP IM CONFUSEDD!! DOES HE STILL LIKE ME?