Is it normal that i like to pleasure myself over the internet?

To be blunt about it, I really enjoy flirting and talking to people in chatrooms, and have done since i was 13. Another thing which I think is'nt entirely normal is that i have pleasured myself since I was 11 years old. I even exposed myself to a guy in a chatroom when i was 13,and I felt really dirty afterwards, yet I kept doing it. I've even stayed up the whole night online to do this. I think I do it because I'll probably never see these people again, but what I really want to know is, is this normal? Please comment honestly I don't mind if you're mean. :)