I'm not pretty enough for the guy I like? :(?

In a way this is a mixed blessing. Would you really want someone with this lack of tact as someone you would be with? Even if this is the way he feels, it can be expressed with a lot more dignity and respect than that. He could just say something neutral like "She's nice, but she is just not my type."

As for not feeling good enough, learn to live your life based on your wants and your needs. Do not live it trying to please someone else. Take steps that you can control to make yourself happy. Improve your life by going to college, learning a trade, joining the military, etc. Find the things that you like to do in life that you enjoy. Surround yourself with people who appreciate you. Be happy with yourself first, and then you will be more immune to cheap shots like the one you just took - whether they are unintentional or not.

Look, that sucked but you need to see the silver lining, and there is one. It's time to look elsewhere for a partner and understand it's not going to happen with him. Things often don't work out between couples for all sorts of reasons but many people waste YEARS of their lives fumbling around emotionally latched to the wrong person or dream. You don't have to be anymore. Get excited about who's next on your horizon.

Wow..... That was a very rude thing for him to say. But maybe he was just joking. idk the guy or anything so I wouldn't know if he was serious or not. But don't think too much about it kiddo. It will get better. *lie*

He sounds like an asshole. Move on.