Hi, Tetra.
I'm with Anna on the part about trying out your wings and gradually developing some independence.
I think your sense of self-worth should come from your own positive achievements and attributes (as well as from the HP, who "don't make no junk"). I fear that now you are too defined by your parents' every fleeting mood.
The counselor told your dad that your small relapse was only a blip. It's on him if he's still all torn up over it. You have proved that you've already moved far beyond your relapse.
I think your parents need counseling, probably even more than you do.