Fan Casting Chronocid

It's a pretty complicated story so hold on tight : Luc and his friend Brock have created a time machine. However, Brock gave Luc the responsibility of doing the test time travel (because he was hiding from Luc that the radiation emitted by the machine was harmful and that he didn't want to get sick). Soon, Luc receives a letter from his doctor telling him that he has incurable cancer (but he doesn't know it's from the radiation). Obsessed with his own fate and frustrated at not knowing the date of his death, he goes to the past and kills himself in the future. That way he knows exactly when he is going to die and is no longer afraid, can enjoy life to the full. When Brock learns of this, it causes an argument but soon Luc meets Maggie, the love of his life and realizes that he no longer wants to die. He then decides to go back in time to stop the past version of himself from killing the future version of himself. But, alas, not everything works as expected ...