I feel that way a lot too. My classmates are around the same age group, but we all have very different backgrounds. Some are already playing in bands, in bars or in church. A few were complete beginners fresh out of high school. Some, like me, have a little college, and a little music beforehand.
My classmates would look up to me because I'm the "most intelligent". It apparently has nothing to do with music, but it does help me with studies.

I am neither the best performer or musician. Sometimes I think I am the worst, actually. I'd feel depressed because I put much thought into this, and these people just play things through and they're doing better than I am.
I've been depressed lately, yes. I panicked and thought I wasn't going anywhere. All of my fellow piano majors are joining the grand recital competition this year. I got back to the piano the other day, since I got a lesson and I had to go even though I wasn't in the mood. Teacher was oblivious to my problem and talked to me so much I had to cheer up anyway. She was ranting about the competition, how some people should have won in the past, and some should have been disqualified, blahblahblah. I couldn't believe how people would cheat to get in, and my teacher was honest but she was just ranting. It doesn't make her angry or unhappy at all. I don't feel bad about not joining anymore. By my teacher's standards, you may say my classmates cheated to get in. But I can still join next year, fair and square.
Not that competing matters to me any more. The judges are unreliable anyhow. It is always such fun to play and to perform, and when I'm in the zone I forget all those insecurities. Just play what I want to play.
Must be hard for you to be the oldest student, but let me tell you, the oldest in our class is Teacher Jose, who is around 60-70!!

He learned violin when young and became a teacher, but he also wants to learn music theory to compose, and other things about music. He's enjoying it so far.
