not going to live in eternity together

for a couple of months now, a friend of mine has been on my mind constantly. am i doing all i can? am i living as a Godly example? am i helping her get one step closer or one step further away? she is dear to me and i love her. we are so much alike yet one major gap lies between us. i am saved by grace and she is not. the friend i spend a lot of time with and invest into will not be in the same place as me after life here on earth. i am praying that her heart opens to even the idea of Jesus. i hope i can plant at least a seed in her life or be the water to help that seed grow. i have faith God can do anything and has the power to change her heart. but i do hurt when i think about her. i wrote a note to her a while ago to prove that i have been praying for her since day one and that i believed in God's power and love. when she becomes a Christian i will give it to her...hopefully. i only have one more year with her before i go off to college then after that prayer will be my only tool. am i doing all i can?..am i?