i’m heartbroken

so a month back i was “broken up” with by a boy who i was with for the entire summer, literally. i saw him almost every day, since we worked together also. he said he wanted to be with me forever, building my confidence and making me feel very good about myself since i was dealing with depression and anxiety. that summer felt like smooth sailing despite multiple different traumatic family events and mental breakdowns. he was there for me, and i was there for him. i would do anything to see him and be with him. we never were official due to religious reasons, but he said he would wait for me and would do anything to be with me. and then he called things off and decided to be just friends and it feels like he doesn’t feel any sadness or remorse or sympathy for me because i was so in love and he was too i thought. but i see he’s been at random girls dorms and half of the stories he posts on snapchat are with girls dancing and grinding and drinking and it makes me sick. like physically nauseous.

idk what to do. i love him with all my heart :/