I went to a going away party for my old work that I left 2 months ago and someone commented that my face looked fuller.

I agree with most of the sentiments on here. Physical attraction is natural, and nobody is shallow for being attracted to whatever they are attracted to. Shallowness would be determining someone's worth based on only the physical.

^^ +1

3000 calories a day would still work out to around 3500 extra calories in a week, which would give, on average, a 2kg gain a month. That's what I do. I wish I could fit more in by I physically can't. Much more than that and it stops being fun for me.