I recently made an account on okcupid and have received a lot of messages. I really like a lot of the people that message me and really want to talk to them but can't. For some reason I just CAN NOT message people back sometimes. I can say hi or how are you but then I'm stuck. Sometimes I am in a certain mood where we can talk some but then I just can't do it anymore.

I'm the same with my friends even, I will go offline on facebook messenger, mute people, ignore messages because I feel like I can not reply? I can not communicate. It's not even that I'm really scared feeling, I just don't know? It's like I can't think of what to reply to them and still sound normal.

I used to not be like this. Now I can't talk to people in real life and can't do it online either.

Any tips for talking online?