I don't know why but he suddenly became upset cuz I blocked him in fb but I was forced to block him wish he forgive me and he doesn't know I love him cuz I have...
What do you mean you were "forced to block him"? Wouldn't you be upset too? Note: If he's upset it's because you mean something to him. Talk to him. Don't cry nor tell him you love him yet. Step by step.
