This is basically Jon looking around and seeing all the other bands being half his age and thinking how ridiculous it is.
He's also reminding himself how much he loves what he does. On a US tour last year (?) it became too much and he jumped on a plane and went on holiday with his girlfriend, Heather (aka Chelsea Dagger), who is now his wife. He's yelling at himself for ever complaining about his life. "I'm so sick of hearing how your love for this has died."
This is basically Jon looking around and seeing all the other bands being half his age and thinking how ridiculous it is. He's also reminding himself how much he loves what he does. On a US tour last year (?) it became too much and he jumped on a plane and went on holiday with his girlfriend, Heather (aka Chelsea Dagger), who is now his wife. He's yelling at himself for ever complaining about his life. "I'm so sick of hearing how your love for this has died."