I have some self image issues. Help with confusion?

Well. Here's my predicament. I'm 19. I am a female, and I've not really had a boyfriend. I don't really think I'm an ugly person... but I am big. And that's not me being a self conscious teenaged girl, I am a big girl, and short, so really, I am pretty plump. I don't walk around like I'm afraid everyone's making fun of me or anything, I am pretty confident, self sufficient. And I'm a sweet, semi intelligent person. So my question is, honestly, is my lack of a love life due to my weight, or something else? I understand that being overweight is unhealthy, that's not the question. That's not what I'm asking. I'm asking... are there people who are attracted to my body type or am I doomed to be alone until maybe someday I look like every one of my stick thin friends? Do I need to change myself to find someone to be with, or is it something else that is repelling the men folk? Lol. I'm asking for honest opinions, but if you're gonna be a jerk, please don't flame me too bad :). Thanks.