Is it normal to be like this

I always change my mind after starting something. For example, I can go to a certain site and chat with some guys. I flirt a lot, we sext, and when the guy asks for a nude, I just go blank and exit the site then come back after two days then I check if I have received any messages then after that I delete my account and then I go to a penpal site where I know people don't have dirty chats.

Sometimes I can be really into something or someone. But I can be waking up after sleep,starting to something or walking then I just feel total hatred for that thing or person and after that I can no longer stand looking at it again.

I can also be too sweet to people but my behavior towards them can change within seconds and I get mean and rude without any reason.

And later, I come to regret most of my actions and I can't face the people I was mean and rude to. I always hide from them and when I see them I get anxious.

Is this normal?