Thank you for being vulnerable and posting this. I’m sure you’re not alone in this situation, I for one feel the exact same way - very nervous and self-conscious. Recently I’ve begun accepting my body for what it is - imperfect, flawed, concealing a kind heart. I think a lot of people (not just masseurs) respond to this self-acceptance, and kindness goes a long way. Treat them like you’d like to be treated.