what is wrong with me

dont know what is wrong with me man.. getting upset over my mom going out with her 'boyfriend' or when I heard that he is coming to our house.. Today, she was supposed to accompany me to go to my auntie house but apparently the guy called her saying that he is coming over to my house.. dont know y but i got really upset when my mother told me that she would not be accompanying me to my auntie's house.. what is more saddening is that when she went out with her 'boyfriend' she didn't even told me that she is going out.. she just went out with this guy, close the door and then I realise that she went out with him.. I dont know why I am feeling so sad from this.. Maybe because I dont want her to be so close to this guy as this guy is married with kids.. maybe I dont her to be hurt one more time.. guess I really have to figure it out