I agree with Sugarcatmom. This kitten was taken away from his siblings and momma much too early and he is just playing like kittens play.
Is your BF 100% consistent with the rules of NO PLAYING with the hands/feet, etc? Are you gentle with him when you are telling him NO and distracting him with a toy? Does he have a toy that is big enough for him to wrap his legs around and bunny kick?
Please no hitting, that can teach him that it is OK to play rough or if the hitting is hard, he will not trust you. A second kitten the same age would certainly help out in socializing him.
Cat maid to:
Puddles, female Himalayan (16 yrs)
Jasper, male Ragdoll ?? (approx 9 yrs)
Sweet Pea, female silver tabby DSH (approx 7 yrs)
Rose semi feral, a cpietra rescue, female tabby (approx 6 yrs)
Snowball RIP (1991-2005)
In a cat's eye, all things belong to cats.-English Proverb
“While we are free to choose our actions, we are not free to choose the consequences of our actions.” Stephen R. Covey