Guys, Why did he not fight for me?

Anonymous
Me and my boyfriend had been dating for almost 6 months. Around four of those months had to be long distance because of quarantine. Long story short, me and him had about 3 arguments because it seemed like he always had an excuse as to why he couldn’t or didn’t want to talk to me on the phone. It was kind of hurtful and I explained to him how it made it seem like he didn’t care. Each time he told me he understood where I was coming from and each time besides this last time, he said he would make more of an effort. The last time he was more focused on how things would be different if and when we were in person again ( which would be around two months from now). I agreed and so we decided to take a break for about a month. For some reason, this didn’t sit with me though because he still wasn’t making an effort or even trying and I was always the one fighting to keep us together. I was always thinking about this and it was giving me a lot of anxiety and so I broke up with him. We still talked though and he told me he still loved me and wanted to get back together. I told him I still loved him too but I just couldn’t get over the fact that he never really gave any effort and all he needed to do was show me that he cared because he made a lot of empty promises in the past and I wasn’t going to push him to care anymore. He then told me that he never stopped caring and that he understood where I was coming from and he was sorry. I accepted his apology and asked if this was the end. Basically asking him if he wanted to show me that he cared or leave. He just said “yes” with a sad face that’s it. Why did he not even try? Why was he never willing to fight for me?
Guys, Why did he not fight for me?
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