Hey there!
I lost 50 pounds (a little bit less than what you intend to lose) around the same rate as you intend to lose it. While I am not quite your age, I am closer to it than some people on this forum (I'm 21).
I have a bit of loose skin on my stomach. I hate it, because my stomach is quite firm and has abdominal definition, yet the loose skin blocks it from showing completely. Plus, there's a bunch of puckering up going on around my belly button. The good news is that it IS tightening up. The bad news is that it's tightening up at a rate slower than I'd like it to go. I'm hoping that my stomach will snap back within the next year and I'd ideally like it to snap back by the time summer rolls around so that I can wear a bikini in public without feeling ashamed of the nasty skin!
While saying that, I am SO, SO, SOOOOO glad to have those 50 pounds off me that I'll take some loose skin over the flab any day! The other good news is that while the loose skin shows when I lift up my shirt, it is invisible under every outfit I own.
By the way,
!