I know the feeling! I wonder if it has anything to do with (this is going to sound weird) but (don'teven know if I can explain it) but a sense of security with that person. My son does this to his older brother all the time! When he gets too excited he just attacks him! We can't go anywhere!!! He doesn't do it to other people, just his brother. I know the love is there, he just adores his brother, but like he is a safety zone, and I just don't know how to explain it. He misses him to death if he is gone, when his older brother went ot camp he was so depressed it was horrible to see. Then he saw him and it was just chaos! He was attacking him and calling him names! I know he doesn't mean it, but it is like there is just no control and so far the only way I can get him to stop is if he knows his friend is going to come over and I can tell him he will have three warnings and if they are used up your friend willn ot be coming over. So, it is nice when I have that in my backpocket to whip out! Otherwise, it is just exhausting!