What to do! I'm very confused!

My ex-boyfriend left me a month ago... and i had always asked him if he still likes me.. sometimes he'll say "yes" and other times he'll says "idk" and sometimes he'll say "i do, but not the same" and i always feel like he leads me on..
then one day i kissed him.. he didnt stop me.. and then i asked him if he still wanted me to kiss him.. and he said "idk" and me always thinking negative.. i took it as a "no"
so i cryed and something really great happened :) a really cute guy that ive known since 5th grade regonized me at some place and we mingled alot.. and i started to grow feeling for him.. but he doesnt go to my school:(
but i still like him.. and i didnt get to tell him that i thought he was cute.. then the next day my ex comes up to me and i see that he was wearing the necklace i got him for Christmas(when we were together) :O and he was flirting with me then kissed me!!! Can you believe that!! i am so confused!! I keep falling for his charm!
he had given me some hints before to get lost!! now im confused!! and i told him, that if he wants me back he has to prove it!! and i told him about how i kinda got over him and starting liking this other guy!! and he wanted to know who! but i didnt tell him.. plus he wouldn know who he is cause he doesnt go to our school.. so PLEASE!! help me!! he's given me mixed emotions!! i had finally gottn over him!!! i was sooo crushed by our break up
now i dont know what to do!! i dont want to get hurt again by him! but i keep lying to myself im not completly over him.. :( i admitt that.. but please help me! ive been through so much CRAP!! and hes that one who put me through it!