a big frame is bone not fat. a large boned person will still be very thin if they are very thin. it takes more muscle to support your frame so you are actually thinner at a higher weight then a small boned person. Is it that you know your weight is normal yet you look very large?
Everyone is beautiful no matter who they are. Yeah you may be big framed but that doesn't mean your unattractive. I have many, many friends with big frames and they've dated a lot. Don't worry what other people tell you (if they tell you anything). Your beautiful just the way you are, so don't let someone change that or take that away from you.
Looks are not everthing, its personality that counts if you are a beautiful person inside it will shine outside. Beauty is not what makes us attractive so love yourself!