Well unfortunately I must disagree with you there, I feel like what they were trying to do was to make them trust you due to the fact that whoever you choose as a love interest will have the pendant you were given as a child. Maybe you confessed to the person when you were younger and now that they know you don't remember them they're trying to start stuff fresh and new. Walter is generally not an aggressive person so making him force the person to reveal the truth would just make them refuse to do it completely and distance themself from him. Yeah I know it would probably end with an apology, love then the truth comes out but remember this game is supposed to be 15 days. And that plot is good for only 4 DAYS at max. Yes I do find the route he's taking irrational and stupid by not being persistent on his own life but it gives people more plot and time to fully understand and love the characters in the game.