Broken-hearted 😢

So, my boyfriend and I have been together for 7 months and we broke up a few days ago. I know 7 months don’t seem like a long time but he became a dear friend and we shared a lot of memories together. It is painful to wake up in the morning and realize that he is no longer in my life. You see, we both have a very busy schedule and we both knew we wouldn’t see each other as much. However, in the last 2 months or so, it seemed like he stopped trying... slowly I realized the late text responses and we only started seeing each other once a week, instead of 2 or 3 times. And he never calls! I sometimes forget that I have a boyfriend because he is so absent in my life. I told him how I felt before multiple times and each time he promises to change, but I don’t see consistency. I told him again how it made me feel a few days ago and told him to let me go if he wasn’t gonna put an effort. He always makes the excuses that he is busy but how busy can you be? Anyways, despite all of that, I still fell for him and he was an amazing person and I still care for him. I am hurt that he didn’t try to win me back or fight for me. That hurts the most! What shall I do? Should I call him? I just don’t know what to do?