I'm curious , do you find yourself attractive? I'm sensing self-esteem issues since you are questioning yourself?

There is no point of comparing yourself to someone else because It will tear you up in side. I personally think that word "sexy" can mean a lot things other than attractiveness. Intelligence or a sense a humor can be sexy to someone.

Also, I don't know why your bf was sharing a picture of an ex girlfriend on myspace and that's something that is something that would make me uncomfortable. Maybe you should talk to your bf about your concerns. You won't know until you ask.