My college girlfriend and I (both women) were together for four years, through a pandemic, graduation, and almost a year of post-graduation long distance. It was a very good relationship; we basically never fought, treated each other very well, genuinely liked each other, etc. She broke up with me a few months ago after realizing she wanted kids-I definitely do not.
To have a good relationship, you have to put in effort. Your effort should go towards communicating well, for example, learning to bring up concerns in a considerate way and working on listening rather than getting defensive. You should also have the necessary, but uncomfortable, conversations that help a relationship thrive, such as conflict repair discussions and talks that help you work as a team to meet each other's needs.