Something That Makes Me Sad

It doesn't really make me sad that Kaius calls me Daddy. Josh is the best daddy ever. Kaius just runs to him when he gets home...they rough house...its fun. I'm thankful for it.

What does make me sad?

Kaius hits me.

Every day. Multiple times a day.

Not only when he is mad, but when he is playing around. But when he's mad...he hits me square in the glasses.

It hurts SO BAD. I always tear up.

I've tried ignoring him. I've tried calmly telling him "we don't hit, we hug!". I've tried getting in his face a FIRMLY telling him to STOP. HITTING. ME. I don't hit YOU, so YOU don't hit ME.
I've tried immediately putting him in his crib, but I stopped because I don't want him to think I'm punishing him every time he goes in the crib. Like jail, right?
I've made a little time out area that he can't get out of, but lots of the time he does it when we are NOT in the house. Like when Josh is coaching volleyball, and he tries to run onto the court. (that happened last night. OUCH!! my face!!)
I've tried YELLING at him. But I could tell that hurt his feelings. He bawled and I tried soothing him and we cuddled but I don't like how we felt doing that.

He hits and bites other kids. He hits for no reason, but bites if he wants their toy. What the hale do I do in this situation??? I tell him we don't hit, and take him away from the child.

I've tried everything. But if you have any suggestions, I would LOVE to hear them. He has been doing this since he was a year or so. About 4 months.