insecure

I almost always am very insecure about my musicianship. I lack confidence. But the truth is that I'm a good musician. People tell me this often, in fact. People who I consider to be better musicians than myself. And yet, I can never seem to gain confidence about my playing, and I never seem to take the compliments well. I've been playing some sort of music for around 20 years now, and what I consider to be my main instrument for over 12 years. I play regularly at church, which is at least twice a month in front of around 1000 people, and I write songs. But I get nervous when I need to do certain things, and I'm not satisfied with my songwriting. So, what do I do? I don't know. The best I can come up with is to just do it more, and the more I do it, the more I'll get used to it. But for now, I'm still insecure.