Please i need advice. We broke up and i don't know what to do?

I recently (June 23rd) got separated from someone who intended to get married to me. He complained about my attitude and some other things which I got to hear from other people. We lived in different cities here in Nigeria and the last time I had to travel to see him and discovered certain lifestyle he said he stopped like drinking. On one of the days during my visit which was June 15th, we went out with his friends, male and female. Apart from other things that happened that day we got back home by 1am in the morning. I complained about the late night and his drinking habits and he said I embarrassed and disrespected him in the presence of his friends. He complained that I get angry easily and that I never take instructions... After I returned, communication reduced and I called one night and he rejected my call and didn't pick when I call back. He didn't return my call next day which is unlike him. I got to know him through my cousin as they both work in same office. She confronted him and he said he doesn't like someone who keeps repeating things he doesn't like. He stopped talking to me and I got to speak with him three days later and he said he doesn't want us to be a mistake to each other and he is praying and I should also pray and that we are not breaking up. Later that night we spoke when I got home and he was upset and on top of his voice. That i disrespect him and that he he has complained somuch about my attitude and that he isnt getting younger and wants to get married, that his family mock him to go get children when he plays with theirs and that he isn't getting younger. I told I loved him and that we should forget all that happened and continue and he said he didn't know I valued the relationship if not for the situation. He said we can be friends. I asked him to forgive all I did and give me a second chance but he replied saying he didn't say he won't give me a second chance and he asked me to stop crying and wash my face and that we were going to talk the next day which we didn't. Few days late I called thrice he declined and I sent a message which he has ignored till this day. Someone I met through him did her investigation (I didn't ask her to) and discovered his step sister introduced him to a girl in her church and they have been going to church together. I have been asking questions, trying to let go. I have and I am still praying for strength to forget. I have exams in less than two weeks I can't focus. I never claimed I was perfect. We met in November (which he assumed the relationship started) last year and started dating properly in April during our first trip together. He was in a hurry to get married within months and I asked him to take things slow because we met through someone and we need to know each other more because I know I wasn't perfect and I needed to love him even with his faults. I asked him to be patient And he said he will. He has always been positive and corrected me in love, but suddenly all that changed and he just left, we didn't even sit to talk. I don't know what to do.