bones i went through this 4 years ago my real dad and mom split before i was born and i was brought up or dragged some might say by my grand parents on my moms side when my first son was due 4 years ago i got in touch with my dad and we met i also met my 11year old half sister at first everything was great then about a year and a bit ago we just ran outta things to say to each other and weve not spoke since.so my advice would be get in touch by phone first and hopefully mate it will all go well just dont do what i did and go at it like a bull in a china shop.goodluck mate 