PMS??

Ok so usually everything with my period is pretty mild, I've never had super bad cramps, and I've never really noticed any crazy kind of emotional distress. But these past few months I have noticed I tend to cry without much reason, and feel overly emotional about stuff, and I know that's pretty normal but because it's new for me I wonder if it could be because of my boyfriend? We've been together 8 months and I really really love him since I'm so emotionally involved could it be sorta "his fault" that my emotions are heightened? 😂