First of all, please do not be impatient. This is not a chat forum and it may take some time - perhaps as much as 20 - 30 minutes for someone who has an answer to your question to come along and respond.
Secondly, this is not a chat forum. You will have seen the rules as you registered. You are asked to post here using standard English forms, which includes using capital letters where appropriate.
I would use "got to know" in relation to someone I got to know on the Internet.
I would also use "met".
I met ducki on the Internet.
My listener would know exactly what I meant - and would not assume that we had met in person.
I was pointed to this site by a forer@ whom I "met" many years ago - I call her and other people I've come to know "e-friends". And in the aforementioned forer@'s case I can say we were e-friends before we became actual friends - we were living in different hemispheres and only met after some years.