<human>: With the risk of sounding like a douchebag, I can't help it, but I have a type. I'm most attracted to petite girls. For me, being healthy and active is important.

When I first started dating her she was into going to the gym and taking boxing fitness classes. I loved that she was doing her own thing and coming home sweaty. She's since fallen into a slump, replaced working out with watching tv and browsing facebook, and jokes about how much she loves eating her feelings and how she can't wait to get pregnant so she can eat everything. She's still a healthy weight, but I worry.

When I hint to her that I want her to stay healthy and not gain a bunch of weight she gets really defensive. It seems like every week now she bombards me with what if questons like, "Are you still going to love me when my metabolism slows down and I get fat?" OR "Are you going to stop loving me when I get pregnant and gain tons of baby weight?"

I try to tell her that I'd help her eat healthy and go to the gym and do other active things with her. But she gets mad at me that I'm associating getting fat with being unhappy or giving up.

At this point she knows I don't want to see her gaining a lot of weight and it bothers / scares her that I might not love her unconditionally. I don't know, but I feel like the weight thing might be conditional for me if it gets out of hand (I at least want her to try and be healthy). How should I talk to her about this without giving her anxiety or making her spite me? Or am I just a douchebag for being worried about her weight/health when she says it doesn't bother her as much?

Can you give me the gist of the text in a nutshell?
<bot>: Am I wrong for not wanting my girlfriend to gain unhealthy weight, and any advice on how to talk to her about it?