Am I selfish? 😞

I have the most incredible boyfriend. He does so much for me and we love eachother to no end. But sometimes I worry I'm totally selfish and that he deserves someone so much better than I am. There was one particular thing we were both going for, and he was chosen (among others), and I was  eliminated. It's a long story, but basically I was SOO torn up about the rejection and honestly wanted him to quit because I didn't make it. I knew I should have been happy for him but I just couldn't because I wanted to do this particular thing together. I never told him this but I think he saw how sad I was and quit, even though it would have been great for his resume, because he didn't want to hurt me. I feel horrible about it.
It's also little things that sort of follow the same trend. I try to BE the bigger person and become more mature about things but it's hard and most of the time I can't and feel like I don't deserve him. I'm not sure what I'm asking here. I don't want anyone to question how much I love him because he's legitimately the most incredible person I've ever met. I just feel like he could do better 😞