There are some loose ends, some things are only touched upon that should be expanded, and these would have made for a fuller picture, but the story stands well enough as is.
I understand the "stay out of my bedroom" edict quite well. Some of us need our own space if we are to function properly, and that space can be a refuge for solitude and thinking, or just to get away from the kids. My experience shows this strongly to be a male thing (your mileage may vary). For my father, it was his tools: hammers, saws, wrenches, power tools, etc. We were not allowed to get into his tools or the space they occupied--not even for a lousy screwdriver. One uncle wouldn't let anyone in his basement--his refuge, and other's had their own spaces. My mother and my aunts--to the best of my recollection--never had these spaces, nor seemed to have any boundaries at all. I didn't understand the reason for it as a child, but I do now.
Tommy comes across rather strict with the trust issue, but don't we all have things we are less than willing to budge about. This one seems important and Alex is very much aware of it, he knows what he has done. That he broke the trust in the manner that he did speaks of his youth; that he understands what that breaking truly means speaks toward the man he is becoming. I thought this facet came across well.