I would add my rec to the others here for "In this life". That sweetness Amanda mentions comes well across - the description of a tentative, bashful kind of getting emotionally and physically closer to each other that I do find very appealing.
**spoiler**
I have been wondering a bit about the realism in this particular Jack being completely without friends, though.
Also I find his mom seems difficult to understand - she's providing a loving home to too many foster kids, but in the fic she hasn't much come across to me as a person who's particularly sensitive to the psychology or emotions of those kids. Nor that of her own son, at all. She's seemed distracted and distant throughout. Then suddenly last chapter she showed that she *could* be both perceptive and understanding of her son and respectful of his privacy. Not bad in a teen son's mom, given the circumstances.