there is a manga i am looking for where this boy and girl fall in love but in the girl goes to space for some mission i think and they keep contact through messaging but as she goes in space she keeps going further away from earth so the time it takes for the message to through is longer. So she does not what to do and i think during the mission she fails or something. thats the only information i can remeber

It's anime Voices from a Distant Star/Hoshi no Koe, and here's the adapted manga version.

ohhhh thank you very much
thats the one i have been looking for