Do you ever feel threatened by

If I felt threatened by that I would feel that way all the time, there is always someone pretty, skinny, or better, I just have to be happy with who I am the way I am.

Most likely, it is really just your insecurity that causes your feeling, and these others girls are really not prettier than you, even though you think so. If your man really loves you and acts as such, other girls pretty, or not, will see that he is in-love with you, and thereforefore will not attempt to take him from you.