Trust me, you will not be skinny at 145pounds. I am only half an inch taller than you. I've been as skinny as about 115 or even less i can't remember what the lowest i ever was but it was very small, not anorexic but as close as i can get to that without being considered sick.
Just enjoy yourself and your new body as you go and don't worry so much about the future. Deal with it when you get there. You'll see.
RAther than worry too much about what you might look, think a little bit about how you are going to maintain it. Don't go relaxing too much. People with a history of bad eating habits can't really afford to relax too much about food. At least not for a very good while of maintaining.
I'm saying this to you but its something i'm telling myself more or less every day. Not in a deliberate way but just thoughts that come to mind and i'm aware of because of past experience.