How do you balance a serious relationship when work is your top priority?

I (25F) was in a relationship with a 25M for 2 years. From the start, I knew he was extremely ambitious - he worked his job 7 days a week and was also trying to start his own business. I’m high-performing and ambitious too, but I make it a point to keep my Saturdays free for personal time.

Over time, our relationship suffered because he prioritized work over spending time together. We only saw each other once a week, and even that became difficult when he wantes to dedicate weekends to building his startup. I was supportive - I meal-prepped for him, made my home available so he could cut down on travel, and even suggested moving in together to make things easier. He refused, as staying frequent nights messes with his routines (eg gym, he has a gym at home) and moving in and paying rent messes with his financial planning of retiring by 30 (he lives with his parents atm) But ultimately, he broke up with me, saying the “timing wasn’t right” and that the kind of relationship I want suits someone with job stability, not someone trying to build something.

For those of you who are overemployed, working insane hours, or building something of your own - how do you balance relationships? Do you think relationships are only possible when work settles down, or is there a way to make it work? If any alternative/solution I propose messes with another very important aspect of his life, what can I do? He says the timing is not right, but a part of me feels he would have put in effort for the right person, and its my fault and he didn't love me enough, unless I am being wrong and naive?