I was assaulted by my own son.
I'm sorry that happened to you. Why did he assault you?
Because I requested him to move out of my house and he refused.
Parenting is hard but you cannot let your child get away with abusing you. If he is an adult and you want him out of the house then you don't have to keep him around. If he refuses to leave, you should contact the police so they can help you.
It's not that big of deal. I stopped him and he didn't even leave a bruise.
It is a big deal. Regardless of if he left a bruise, he still assaulted you. I really think you should consider calling the police if he won't leave the home or continues to treat you this way.