Is this rude?

Something was said to me the other day by my grandmother who doesn’t see me as often now that I’ve moved almost two hours away from her...since I moved I have lost close to 50 lbs I’m very proud of this accomplishment but when I saw her the other day she said “thank god you lost some weight you’re too pretty to ever be that big” and I’m trying to take that as the compliment I hope she meant it to be but I have a hard time with that and can’t tell if I should take it as rude I know she loves me and all but that’s just something I don’t know how to take she used to always ask me if I was ever gonna try to get “skinny” again and that always discouraged me from wanting to try bc I felt like I was disappointing her when I wouldn’t meet my goals just need some help wrapping my head around this