These people were NOT your friends! I'm glad you found a wonderful guy, so sorry if they were jealous, and I say this as a thin woman.
I got the exact reverse when I rekindled my relationship with my high school sweetheart. In the 20 years we'd been apart, he'd gotten bigger, as we do sometimes in mid-life. He was close to 400 lbs, a big guy. So what? Love him. The hate I got from bigger girls telling me to leave him alone because apparently I can have any man I want...you wouldn't believe it! I didn't pick him because he was big. He didn't pick me because I was small. We picked each other because it clicked, it worked. PS, I can't have any man I want, well, yeah, I can, in the sense that he's the only man I want. But I'm not everyone's cup of tea.
People really need to mind their business. I can't comment on what it's like to be big, I've never been, but I do know what it's like to be placed on the "other" list.
be you, be happy and well, fu*k the rest!