i don't think you should be embarrassed by what you believe in. i'm not sure if it's worth believing in something if you have to lie about it. then what difference does your belief make? it's not manifest. are you trying to conform? do you want people to like you for a lie? whatever you believe, be honest. otherwise you're just reducing the meaning of your life down to fiction. and if you don't know what to believe, then be honest about that too. humility is a great thing. and so is respect. give people a chance to respect you for who you really are. and if they choose not to...fuck em.
I'm not embarrassed, nor am I lying. It's just something I don't feel comfortable saying, unless directly asked. Part of being a good Christian is bringing others to Christianity, so even if my friends never said anything or did anything it would weigh on their heart and I think that might alter our relationship. Plus it would be rude to say heathen like things about religion when I'm with them like I do when I'm with my mother.