I keep trying to find reasons why I'm single...

So I'm 17 and I've never been in a real relationship. I'm also a virgin. Most of my friends are not virgins and have boyfriends so it's very uncomfortable for me when they talk about them because I get kind of jealous. Like I really want to date but it seems that no guy is attracted to me. (Well older guys are like 25 and up but I just don't want to have to deal with the issues that may come with that) Another part of me is just like oh well so what I'll be graduating soon and starting a whole new life. But that constant nag of wanting to go on dates and talk to guys and join in on that conversation about boyfriends is always there. Idk it's kind of frustrating. I honestly don't know what to do. I'm also kind of lonely. I'm just a bundle of frustration and sadness.