Still crying over ex...

My ex.. we were together for nearly 3 years, they were my high school sweetheart, they were my first everything, first boyfriend, took my virginity etc.. we ended really badly. We broke up February 2017.. and I still cry every night about him. I don’t know how much longer I can keep crying. He’s moved on, he’s happy and I’ve been miserable for nearly a year. It’s gotten to the point where I think I’m honestly depressed.. I don’t talk to my friends anymore, my family.. I just lock myself in my room and cry. I don’t know what to do anymore it’s killing me.