Upset mother??

I’m 18 and attending college 3 hours away from home. I live on campus and have been with my boyfriend for 3 years, he is 21 if that makes a difference. Every time I come home for a while I spend the night with my boyfriend for a day or two. Some weekends I will come down and spend Friday and Saturday night with him and then come see my family Sunday. This doesn’t happen as much as me coming home and then leaving the house to spend the night with him and then returning home. I ask her to be nice but every time I do she catches an attitude and is rude. Like I’m 18, in college, not living at home anymore... would you be mad if your kid did this??