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

I started dating this guy who I had on a pedestal for basically my whole life because we’re family friends and he’s a very hard worker and very dedicated to his work which I always admired. He’s super creative and he’s gone pretty far but throughout the relationship, which was only six months by the way, I often found myself questioning if he liked me, sometimes he would make comments about how attractive my friends are I never really felt quite secure and like he really did care about me and he didn’t have eyes for anyone else or even I found myself questioning if he really did care about me because he’d be so busy he wouldn’t necessarily have too much time for me. You know just to send a quick text and say hey I’m gonna be busy he wouldn’t do he would just call me after two days and be like hey sorry I was super busy you know. I guess that’s just a long story short so I went to go break up with him. I told him that I didn’t feel like he cared about me and he told me that wasn’t the case whether I believed it or not, but that he had also been thinking on his work trip that he doesn’t know if he could give me know the time and energy that I deserve but in my head, I just feel like if you care about somebody, you don’t want them to leave you know he did ask me a couple times if I’m sure that that’s the decision and he asked me if he could think about it for a week but ultimately I ended up leaving and he said he would call me this week and I mean we broke up on Monday. It’s now Friday he hasn’t called yet. I don’t know. I really don’t know what to do. I wanted it to work but at the same time he was always so busy. I don’t think I ever fully got the chance to show who I was vice versa. He keeps saying he cares about me, but I don’t understand why it’s so hard to show it. I’m not asking for $1 million dollars.
How do I know if I made the right decision of breaking up with my boyfriend?
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