please dont block me

If that person has ur number then i don't think its possible, but if u guys only have eachothers username , clear history both for you and the other person, then delete the chat for you and the other person, then you change ur username and ur main name ... u dont even have to block, they won't find you... or u can do it after u block I think... whatever works for u

you simply can't. when u block someone they wont be able to see your online status and profile picture. but they can still see your name and bio.

Ask here @TelegramAndroidTalk

Just simple block does that