My private messages seldome send to other members when I reply or send new messages.
Any help to fix it please?

Try deleting all the ones you have there first. I think you can have too many.

I only had one unsent and even after deleting it other messages will not send.

you sure its just they havent read it? the messages go into the outbox untill they are read after which they are moved to the sent box.

Yip, I'm sure. Because the player sent me a message saying they have not heard from me after I sent messages to him.

I experienced the same problem when I messaged a few people. So it's not just you.

I don't like people that's why they don't get my messages