Hello everyone,i need some advice from all of you lovely people!

)
Ive been 'special friends' with an incarcerated man for only 4 months and we seem to have a pretty good friendship,we have had a few hiccups but we've always managed to talk them through and our friendship seems to be going from strength to strength.We do flirt with each other in a nice way and we are affectionate with each other too.He's mentioned visits and im waiting to speak to him anytime now.His letters make me feel good and make me smile and i would hate not to have him in my life.
Anyway,the whole point of this post is that im trying desperately to keep a distance from him and i seem to be failing miserably.In some of my letters im very affectionate and loving and in others-when i have my 'sensible' head on i distance myself from him.His letters back to me tend to mimic my mood also.Then a thought struck me,could i be playing 'games' with this wonderful man even without realising? I really dont see a future as such,he's down for a long time and although his case is under appeal i cant ever imagine him seeing freedom again,i cant tell him this though as i dont want him to lose hope.There's no way i can really tell him how i feel about him as i dont want to be an added complication in his life and i feel that he should put all of his energy into his appeal.
So,any ideas as to what i should do next if anything?
Angel