Studying for the MCAT is ruining my relationship

My girlfriend and I just had a very long chat about how I’m not spending enough time with her. We’ve been dating for almost a year now, and I’ve been intensely studying for about 2 months. I’m also a full time student with 4 hours of volunteering and 10+ hours of my lab each week. I don’t know how to tell her that it’s probably going to get worse in med school. Any advice?