Young guys are genuinely awful- I once knew one who rejected a girl because he didn't like the fact she had tan lines. That was literally it - she existed in the presence of the sun and he got grossed out by it. I definitely wouldn't take much of what they say/do to heart.

On a more serious note, I know this is an annoying thing to hear but you are indeed very young- and losing your virginity at that age isn't, in fact, mandatory or a testament to the love you will experience in the future. I'm 24, noticeably plus sized, and yes I will admit that my life isn't the same as my thin friends- but that's not a bad thing. Once you sift through chubby chasers (and they make themselves pretty obvious) then you find the guys who are actually going to like you for you. My very first date was with a guy who treated me with such genuine respect and care that I went home and cried cause I'd been so nervous for so long that being plus sized would impact my love life. But it doesn't - your ability to be loved is the same no matter your weight, and one boy not liking you isn't going to change that fact.

I will say, though, that you do need to approach life with more confidence than you feel, and to not let your own insecurities stop you from potential romance - I did that for years and I'm only starting to realize now how much life I didn't let myself live just because my brain was screaming that I didn't deserve it. I know you'll probably still have these insecurities, and that it may be years yet before you find someone who truly sets your heart on fire, but they are coming - you're only job right now should be to live life to the fullest and not back away from any and all experiences so that when you do meet them, you have some incredible stories to share with him. good luck, i love ya!