I want to break up with my boyfriend and idk why

I don't know why but for these past few days I've really been wanting to just break up with my boyfriend because it just doesn't feel the same anymore like when we call and talk I just don't feel the connection anymore I don't feel excited to talk to him anymore or looking forward to talk to him anymore but the thing is there's literally nothing wrong in our relationship he's literally the most green flag guy ever we've never had any serious fights we've never had any disagreement and if we have he's always immediately apologized and said he was sorry and make sure I'm okay and he's generally the best guy ever but I don't know why I'm feeling like this maybe it's because I'm just stressed or because I've been on my period or maybe because I haven't been eating enough or hack maybe it's the 3 month rule acting up idk but can someone please give me advice should I talk to him about it or maybe leave it alone for a few days and see how I feel I don't know what to do