Well sweetie I have been where you are so here are the blunt answers:
1- NO, they do not love you. People are ALWAYS proud of who they love.
2- NO, you are not the loch ness monster. You're a cute young girl.
3- Don't waste your youth on idiots. Search the internet for BBW sites and join all the ones you can to increase your chances of finding someone who truly likes Fabulous And Thick girls.
4- If he doesn't want to hold your hand in public, he's not worth you anyway. Tell him to excuse you for a minute. Then sneak away and let him stay there waiting for you to return. Go home and laugh about it. Write his name on the bottoms of your shoes and walk on it until it wears off. It feels good!