<human>: Summarize the given text in a few sentences.

My girlfriend and I have been dating for 3 months. They've been good months and we've seen each other at least 5 times per week since the beginning of this month. She left for an abroad program in the UK so I haven't seen her in person for about 3 weeks. She posts picture of herself and her travels frequently and I've been noticing slow, but steady weight gain (or so it seems) in the pictures. Is there a nice way to bring up my concern? 

I really like her a lot because we're very open and honest with each about how we feel about things and if we disagree on something we always talk it out. But, I'm afraid of maybe "going too far" with this considering how touchy of a subject weight can be. I want to bring it up because 1) (and most importantly) I care about her personal health and happiness and 2) if this progresses I fear I won't be attracted to her anymore because that's not the body type I look for in a mate.

Advice is appreciated!
<bot>: My girlfriend appears to have steadily gained weight while abroad and I want to voice my concerns before it gets out of hand. How can I go about this intelligently?