Is he into me?

Hi there!
Thank you in advance.

I was dating this guy for 5 months. He was introduced to me through mutual friends. He is a shy guy and thought he was different from my type. He was nice to talk and somehow problems started due to his hot and cold behaviours. He would only text me at night and it will be very formal. Then he started only reaching out once in two weeks time. I have told him multiple times that I wanted more. He never initiated any meeting. Instead I did initiate some meetings and even asked if he is confused about the relationship. He would then instantly say that he is not confused and he is just busy at work. But his behaviour never changed and during our conversations. he had mentioned that his mother was not friendly with him in his childhood. He would only call me once in two weeks time and only one random message in between. He will have all lame excuses such as he had work, presentation, etc. He is also not open and I fear that there might be some secrets with him due to the way he portrays me. Although he used to say that he has works, he will also find time for his best friend (guy). I suspect that both of them are co-dependent. They went to same school, same college, and now same work (their own business) and even his best friend's girl admitted that their friendship is their foremost priority in life. I am not a jealous person but eventually I found his behavior to be some sort of bread crumping. Things never got better. It was always his friend and work that he prioritized and he had difficulties in expressing any sort of emotion. I felt like my soul was drained as I somehow found a connection with him. Then later, I decided to walk away. Earlier, when I asked for break-ups due to his behaviours, he would say that we can work it but then he wouldn't do anything to improve the situation. I got tired and we broke up finally. We are in no contact for five months. He never texted back. What should I do? I know I did the right thing, but it is like I am suffering from depression. haven't been able to sleep lately and it seems like an unfinished business in my life. How do I get over this? Should I reach him? Is it something that I could have done differently? I am just curious and I am so much in pain now. Thank you so much