NamelessNinja42 wrote:
What is a nice way to tell my girlfriend she is gaining too much weight for me to still be physically attracted to her?
You don't say that straight to face, no matter what. That's rule number one. If you still care about her, you stay with her no matter what. You don't care anymore, you break up and give any silly excuses like having to fight in a war. You never mention reasons such as age, weight, illness unless it's due to her substance abuse or some STD she got from someone else, anything that can do you direct harm and so on.
Suggestion: "Hey girl, know what I did today? I started going to the gym, go figure! I would like you to come with me just, you know, to keep me company and motivate me ...".
If she asks "why? do you think I am fat?" then you say "no, I need to exercise but I dont think I can do it on my own, I need your help. Without you I'm afraid I'll lose any motivation very soon. You have that special way of keeping me going further, please help me darling".
If she is the kind of neurotic woman who needs to be validated all the time and still insists on the "you think I am fat" argument, there's nothing else you can do. She's just discovered she's overeating and that's like a giant baby waking up after years of hibernation. She'll make a scandal out of it and even blame you for everything. Don't worry: if things play out like that, she would do it anyway if you came and just said she was fat, no matter how delicate you did that.
Anyway... if she's that kind of woman it's best if you leave her. Really.