I'm 21 and weigh 15st I had a kid 2 year ago and I didn't exercise when had him but I was eating lots of junk food, recently I decided to start losing weight as wasn't happy and the sex and touchy things had stopped but all big girls need loving I just want to know why he being like this??

Because they are a dog and did not really love YOU. Love is blind ( real love really is) what if you got a skin disease or a accident with a deformity ? He would not want you ?

This is evidence of what they really think about you, loving only the "sexy" girl shows they are selfish and it is about them, not really you.