You must have an "Interview" with Julia, however either achievement requires a different path from the other. Sleep over at your girlfriend whenever possible. Save the game and remember to go home the day after. Choose the dialog options that will not kill you at your apartment. When you have a fight with both Helen and Tanja, choose to go after helen And agree to go to the police. Go to the police again (to earn "A new dawn"); or listen to Tanja, fast forward, and get to Julia's interview. During the interview, choose different options the second time you get there to earn "Lovers forever".