Ugh men

I finally gave a guy a chance he was so good complete opposite of my ex. We matched so good and he loved god . Well I don’t know what happened but he just ghosted me out of nowhere . I still had him in ig but I saw he blocked me from ig and in his phone. He had legit told me he wanted me to be his girlfriend we had sex. Now I feel horrible I have no problem moving on or letting him go but the feeling of abandonment not knowing why he did that the fact that I will not get an answer or see him after I got attached is so difficult I just feel used . I hate being attached to him especially cause we were intimate and I really liked him. How has anyone dealt with this?