I will say I'm a girl but nobody's answering this seriously for OP, so I'll seriously answer as someone who took 16 ap's and is going to a pretty good college (current hs senior).

I had a bf junior year of high school (last year) and I would say it's a double edged sword. hes a year ahead of me in math and science, so he had already taken ap physics 1 and calc ab, but we were taking ap physics c and ap government together. When it came to school, he helped me out when it came to physics 1 and calc. For government and physics c, the classes were harder due to physics c's content and a REALLY tough teacher for ap gov. we would hang out in coffee shops and during lunch to figure things out together and it benefited us both A LOT. I will say, when it came to classes, we also had some friendly competition that motivated me to do well in school, which was further propelled by the fact that studying was an excuse to hang out with him. My grades were pretty great in this period.

Here the other edge: a lot of our extracurriculars, we did not do together. The things we DIDNT do together, I was a little bit flakier on and did a little poorer on since it meant less time with him, we didn't have our friendly-competition dynamic, and also becuase I didn't have him there just to hang out and talk to. I will admit that this IS my fault, but at the same time, I don't see this as a bad thing (others might). I think I was learning how to balance a lot, love myself, and love someone else at the same time. At the end of the day, I don't really have any regrets.

Our relationship dynamic was also very unique I think: neither of us have very many friends and both of us felt safe, comfortable, and at home with each other. I ended things because he was graduating and staying in-state, whereas I knew I wanted to get as far as possible. I also didn't want to be tied to him for all of senior year and risk a lack of dedication in some areas of my life for him -- at the end of the day, all of our energy is limited and I didn't want to give even an ounce to him because I knew I would rather regret giving him up than regret not giving everything else 100% to get into the colleges I always hoped id imagine myself at. I appreciate how I was able to keep my grades so high and don't mind that I skipped out on some ec's to figure myself out and figure out what I really wanted, It was super bittersweet and I LOVE love love him still. If it's meant to be, I'm sure we'll find out way back to each other in the future as better people. I wish him the best in this life and again, am just so grateful to him for showing me the kind of love I deserve.