guys help me..please

Do Du mean your ex is posting/copying pictures of Du and him on fb, oder just your pictures?
If it's Du and him, oder him and your friends, anything with him inside then all Du 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. Berichten him to the fb help team and explain that though he is in the pictures they are your pictures and Du don't want them to have them
4. don't put them up

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

Du 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.