Is it ok to be a bit jealous of my best friend and other friends &their bf's?

It seems like all of my friends either have a bf or are involved with some guy except me :/ I don't mean to be all woe is me but I just turned 17 and I want a bf too!! I've been off and on with my last bf since February but he's 24.. Yeah lol so when we dated it was all secret and I trusted him completely, and even let him be me first, I was 16 then tho. We just broke up in early June and while my friends seem to constantly get guys, im still attached to this guy who comes and goes as he pleases and breaks my heart each time, even tho he doesn't seem to realize it. I feel like he wants me for mostly :/ he never even took me out on a date!! of course I'm happy that my best friend found a great hot guy, but I want to be treated like a princess too!! I don't know how to stop feeling frustrated and upset and discouraged.