She is 21, shy and introverted who met at work a man in his 50s (not a fat, chubby man but a thin and attractive one). They started talking because he has been to france, uk and germany and my girlfriend knows all those languages. They speak french sometimes when they are together and all their coworkers look astonished at them. Then he found out she plays guitar and guess what, he has a band who does the same genre she plays (blues, rock country etc). My girlfriend joined the band. They are all men in their late 20s and the drummer is like, 40 something. And the man, he is the lead guitar. She plays solo. Sometimes I go there to hear her play but she gets embarassed and starts making mistakes. I'm glad she found a new hobby and see her like that makes me so proud, but what if she likes that man too much? I don't speak all those languages, and I cant play an instrument for the life of me, I feel so bad seeing her liking him because he's attractive and has traveled a lot. In the band there are also younger members. There's a guy who looks a bit like me and I thought what if she likes him? I am so jealous and insecure. Before she was in the band my gf was the jealous and insecure one. 

I used to... Which is ridiculous. This lady is brazenly saying it https://youtube.com/watch?v=3qWwv4GuzKE