I feel alone and sad all the time

I'm 19 and I know I'm young. I've slept with a total of 6 people since I lost my virginity in 2015. Most of them were hookups (unbeknownst to me) and only 1 of them was a boyfriend (who emotionally abused me) . I feel so used and hurt because I expected all of those guys I slept with to not ghost me or treat me like an object. But honestly it's just my fault for believing that I'd actually mean something to them. I just want to be held and I want someone to listen to and someone to listen to me. Please tell me there's more to life than assholes who use women. 

Hell; one of the people I slept with used me to cheat on his girlfriend. I told her straight away. I felt so bad for her but I also felt guilty because I should have known he was just being a cunt and using me. 

Sorry for sounding petty.