you're lonely because you're letting yourself be- go out and have fun with mates. you don't have to flirt with guys or whatever but just relax and don't let yourself be put down by this. he's moved on and you know you need to do the same at some point. it doesn't have to involve a guy, you just need to keep your head up and realise you can have a great time being single.
They called us a dead generation,
They told us that we wouldn't survive
They left us alone in the maelstrom
As you can see we're all clearly alive.