How do I know if I made the right decision in breaking up with my boyfriend?

I dated this guy for 6 months. He’s a very very busy guy he’s extremely dedicated to his work which I really do admire I’ve never seen anyone so disciplined. But it also takes up so much of his time and energy that there isn’t really a lot left for me. I often find myself overthinking if he even really does care about me because I see myself remembering things for him and trying to ease his stress and he never really vocalizes his feelings for me or goes out of his way to make me feel appreciated. I went to his house last night to tell him these things and that it’s not sustainable for me because I really don’t feel like he cares about me and he said that that’s not the case but he’s a very hard time balancing work and not only me but everyone else in his life. He told me he didn’t wanna break up but at the same time he understands what I’m saying and that it isn’t fair to me. But I just feel like if he really did care about me he wouldn’t have a hard time. Just texting me when he’s busy to tell me he’s busy and that he’s thinking of me or really just doing the things that you naturally do when you care about someone. Anyways, he told me he felt we were rushing into the break up and that he needed a week to think about if he could be what I need him to be. I just don’t know if he really did care about me. Wouldn’t it just be a nonnegotiable. I already miss him and I just don’t know what to do. I am proud of myself for leaving and not sleeping there because to a degree I do feel like in a relationship your power lies, and your ability to walk away.
But I just wish he would tell me that he really does care about me and he’ll do anything to be with me, but I guess that just wasn’t the case if he has to think about it for a week.
How do I know if I made the right decision in breaking up with my boyfriend?
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