Most Helpful Guy
I think the general rule is, if you're wearing overly baggy clothes, it can subconsciously look like you're trying to hide something or are not comfortable with your body. You're hiding your curves too, so you're not making the most of what you have.
I remember you being really pretty. I think you should own your skinniness. Don't be so insecure about it, cause I'm sure a lot of men love it. Try and get some web advice on the best way to dress for your body type. For example, I'm a skinny male, and wear coats that have broadening shoulders (that's about the extent of my fashion knowledge, naturally, as a rugged male). Do whatever is apt or equivalent for a woman :P