People are calling me ugly anonymously?

Okay so I have always been told I was beautiful by a lot of people , butch course everyone has faults . I always tried my best not to point mines out to myself but I'm talking to this guy and I do love him and I know that's a big word but trust me . I'm 14 btw . Him and his friends were all in a group chat ( when you and as many people as you like all text each other and get the same message ) with his friends and I got added into it and people has said things about me , slagging me and said I had a big forehead but honestly I don't I have a quite small one and they are saying I'm ugly to him and he was saying f u ck of and everything he was sticking up for me saying that I'm beautiful and all that and there is this new app kiwi and it's a bit like ask fm and what you do on it is ask people questions but you can make it anonymous or put your name in it and people have been saying on his anonymously are you still going with that dog and are you and that ugly Burd still going and that really hurt me like so bad I always let things like that get to me . Is he really worth me feeling like this and getting slagged please help thanks xx