A day with a... friend?

My best friend's b-day was today, she also has a two year old just older than Alexis by two months and two days! He tends to be a little violent sometimes so that was the case today. He kept hitting Alexis and Alexis will just say: "stop, don't" or just look at him like a little mosquito (compared to him, this little kid seems very little). Sometimes it takes more than that for a kid like Lee to stop hitting like getting mad, pushing away, or crying and it worked but not for long. After the night at my friend's house, Alexis could already say "Leeeee" and he was really sad to leave but he was tired too so he was happy at the same time. It was a long day though night though because Alexis started having fever due to the vaccine which never before had an effect on him. He was sleepy the whole day but at night he seemed a lot better.