How to heal a broken heart :/?

I really need help. I trusted my bf with anything and everything, including having unprotected sex and using the pull out thing, which caused constant worry afterwards. and he was the first guy I had sex with and my first bf too, and he was older (24, I'm 16) which I loved cuz he took care of me and made me feel so special but now he hasn't texted or called me in 3 weeks cuz I refused to have a 3some. I've realized my friends were right, and he just wanted me for sex and now he's done with me. I cant stop thinking about him and crying, Im so miserable, I've never felt so sad and broken before. I'm hoping to have fun on a cruise this weekend, but idk. What's worse is i can't even tell my parents cuz we had to secretly date. Idk what to dooo!!