Sounds like you need to distance yourself from this individual. They are not your friend.

A normal friendship does not leave you anxious or scared of their reactions no matter what you are up to, however private you want to be or how little time you spend with them. You don’t have to agree on everything or enjoy everything the same way. A friend is someone whos company you enjoy from time to time. But have no obligation to please or requirement to spend time with.

Posting private information about you on the internet sounds very bad. I’d ask them to refrain from that. Escalate that to relevant authoity if it doesn’t stop.