[20M/19F] looking for advice

I'm a 20-year-old guy and it's a bit tough to explain everything, but I'll do my best. My girlfriend, who is 19, and I have been together for almost a year. She's not very expressive and often struggles to show her care and love, but I know deep down that she truly loves me. I find myself often doing whatever she wants, almost like a puppet, but I’m completely fine with that dynamic. However, when we do argue, things can escalate quickly, sometimes even to the point of breaking up, although we never actually go through with it. I often end up complaining that she doesn't spend enough time with me or make me feel special, and that I don't feel appreciated. On the flip side, she accuses me of losing interest in her, liking other girls, and not understanding her. She feels like I make her tally my efforts, suggesting she doesn't contribute as much, and I admit I sometimes do that to prove my interest. If I didn’t care, then why would I put in the effort I do? Eventually, we try to meet up, and I often end up crying and apologizing. Afterward, we manage to laugh and smile together as if nothing happened, until the next argument arises. We're both looking for advice on how to minimize our fights and strengthen our bond, as this pattern is impacting our mental health and academics.