How can tell my ex that I still have feelings for him but I’m to shy too and he has no more feelings for me.

dont its only gonna end bad

Explanation:

If you really are sure he has no feelings for you, then forget him. You'll have to get over it sooner or later. Or you can try to get him to like you, if that's possible.

If you're not fully sure, I'd say just tell him or show signs you still have feelings to him. So what if he says no? Your life ain't over. You know what they say... there are plenty of fish in the ocean :3