Ended with my first love

This may be sort of a long one so bear with me , I am 21 years old going into my final year of college. This past year, I fell in love with someone. I thought I knew what it felt like before but really I was just experiencing falling in love with made up versions of people in my head. I was spending almost every day with this guy for four months. We were not only doing very intimate things but also he felt like my best friend we just clicked. people say that you know when someone loves you back simply by the way they look at you and I just KNEW. It wasn’t something I made up in my head I know it was real this time. Multiple of our friends are dating and attempted to sabatoge the relationship by telling each other things about the other that weren’t true. Ultimately this led to him cutting me off because he believed that I slept with someone else (I didn’t). He is extremely hard to get to open up and that was it for him. For a month after that he has acted as if he hates me. He will leave any space that I am at, say things that he knows will hurt my feelings ect, I tried to at least have no animosity between the two of us and have a conversation but he wouldn’t have it. I am home for the summer and know I need to let go of it and try to move on. I know if it’s meant to be it will be, but i just can’t stop asking myself if it was even real for him or if it was hard for him to move on too. Any advice would be appreciated