im worried that im an obsessive stalker.

ill try to be as vague as i can, as i dont want to go against any sub rules. a man on the internet i met and reach out to often said to me yesterday so so many things, but only one word stood right out to me- obsessive. he said i was obsessive. and well im not here to complain that he was wrong.. hes right. he had a go at me for all the weird things ive said and done, and he said that i was obsessive, and he said that i was creepy, and he said that i was gross. and having him explicitly tell that to me made my eyes open wider, and now im scared that my eyes werent ever really open at all, because i dont know if im imagining my own interpretations and my opinions arent morally right. at first i was just drowning in my guilt and feeling crazy, but now i feel angry and confused. ive wasted so much time today and yesterday going through old messages and trying to remember ones that i no longer had, and thats made me even more confused, because i honestly truly believe that he did things wrong too, and said things to purposefully set me off, and i dont think i believe that thats really true and that i dont really know what happened. i dont want to be manipulative or change the story for myself in my favour, i dont know what to think. and i dont know how to avoid this in the future and i dont know what to do now because i dont feel as though i should be talking to him anymore but i cant block him and for some reason he wont block me and i dont understand why not and thats confusing me and i know that if he does block me again then ill be sad and im scared that when im sad ill do crazy sh/t to hunt him down to talk to him again. and im trying really really hard not to send our conversation to all my friends in hopes of getting their opinions to help me understand incase my opinions arent right, thats why ive probably resorted to chucking it all here. i just want to know if im in the complete wrong or not, what i can do to not be in the wrong again with other people, and how i can stop being an obsessive stalker towards this stupid boy.