<human>: Can you provide a brief overview of the text?

Living in a fairly small place, it's all too difficult to meet people who share my taste in music, and even more difficult to find people who (like me) are interested in writing/playing music. So when an acquaintance invited me to his bands practice a couple months ago, I was excited. Like, in hindsight, WAY too excited. 
The practice was kind of an audition and afterwards they said they liked my voice and officially invited me into the band. I immediately lost my shit (in a good way) and started telling everyone I knew that I was finally in a real band.
Fast forward. We have a couple more practices, I think things are going well, but my style is different from the previous guy so I'm not sure. I don't hear anything from them for a couple weeks, and I get it, we're all busy with school and that.
Then today I get a message from one of the guys saying they think I don't "gel" and they're replacing me with the old vocalist. 
Even if this is fairly dickish on their part, I've also clearly fucked up because now I face the consequences of my over-enthusiasm: having to gradually tell everyone that the band didn't work out, and questioning once again whether it's even worth pursuing my passion for music.
<bot>: I clearly need to remember that old saying about keeping your expectations low so you don't get disappointed. Or if that's not a saying it should be because it describes my life quite accurately.