guys help me..please

Do wewe mean your ex is posting/copying pictures of wewe and him on fb, au just your pictures?
If it's wewe and him, au him and your friends, anything with him inside then all wewe can do is -
1. ask him to stop taking your pictures even though they have him in it, they are YOUR pictures
2. block him as a friend
3. ripoti him to the fb help team and explain that though he is in the pictures they are your pictures and wewe don't want them to have them
4. don't put them up

If they're your pictures with nothing about him in them wewe could -
1. ripoti him immediately for stealing/posting your pictures on fb without your permission
2. block him as above
3. ignore it as your Marafiki say and let him get on with it.

wewe should just ask him kindly to stop posting those pics. If he doesn't listen, just ignore him. He's bound to stop at some point in time.