If I have to go, I will be thinking of your love. (arcady) wrote in qaf_coffeeclub,
I always interpreted Justin's happiness as a result of being "free" of his demons, at least to some extent, on account of confronting (and then being the better man and walking away from) Chris Hobbs. As far as Lindsay goes, I'd say it's a combination of things. For one, she's his second oldest friend and the mother of his child and he tends to play escort to her quite a bit throughout the series (especially in S1, with the car shopping and park-going and scarf shopping). But I also think it has something to do with the money raised on Brian's behalf after he went broke at the end of S3. I agree that it could have been clearer and that it's more implied than explained, but those are the conclusions I drew from it.