Love heart break

You know what hurts? Being used for sex by someone you genuinely like. I have always been really private with who I open my self up to in a sexual way. I was always taught “your body is a temple” when I was 16, I met this guy same age as me, we got along so well. 5 months later I lost my virginity to him. He was genuine at the time. We broke up about 3 months later, but have still been talking and have kind of been on and off since, not seeing anyone else. He’s into drugs and different things like that, and I’m not so he’d barely make time for me, I saw him maybe twice a month if that. We had a downfall and I decided it was time to remove him from my life and move on. So I deleted him, and very well I was doing great, until he re added me apologising. Stupid me forgave him, believed him. Went over to his house, we have a good time, we have sex and just like that now he’s ignoring me. I know I’m worth so much more than that, but it’s so hard to accept. I’m always telling girls to know there self worth and learn how to walk away from the table when loves not being served, so why can’t I practice what I preach?