Please don't. Girls tend to be very hard on themselves anyway. You saying it will crush her.
However. You could start dating her and ask her to head to a gym with you. Maybe you could trick her into eating healthy by doing it yourself with her. That way. She wouldn't know. And I'm sure she wouldn't mind doing it as long as you do it with her.
There is nothing wrong with making her lose weight. Nothing at all. Just dont tell that to her face and be nice. If you truly like her. Why do you need her to lose weight? Anyway. You could make her start working out by doing it along with her. That way it could act as a bonding period and fun time :3 Hope this helped.
take her hiking! and to other actives... maybe even get a gym membership together.. and don't take her out to fast food places... Better cook for her or simply choose healthier options to eat when you're with her... that way she'll be doing activities with you and eating the right foods, without you even saying anything that can seem rude to her and she'll lose weight! :D!
And simply saying it in my opinion is NOT a rude or a jerk... BUT if you say something... most girls or just people in general love to feel offended and love to praise how fat should be accepted cause it's "curvy" and better than being boney and skinny and blah blah blah... so on and so on... so more than likely she will feel offended, might even get depressed or dump you even haha... so yeah just do fun activities and set them as fun dates.. and don't take her out to eat at mc'donalds or similar places... :D!
Go on fun, active date! Like hiking (you could see who runs up faster), the beach or a swimming pool (It's a great fat burner!) Go to the park and have water balloon fights. Prepare something healthy for the two of you; you'll both be eating healthy; not only that, you will have her heart ;)
Nahhh... Not at ALL, Anon! But you do realize you have to take the "good" with the "bad" in a relationship, right? I bet her first question to her friends would be, "Would it be rude if I asked him to grow a pair of cojones!" She could probably kindly accept your other shortcomings, because I bet she's a very nice girl! I can't promise you will make her happy though!
So to answer your question you are a rude jerk, with profoundly discomforting tendencies toward psychopathy. Consider at least pretending to be a decent human being, and realize that other people are not just characters in a movie, but actual people that feel like they experience the concept of "self", also!
Total dick move, mate. With how i see it, you just wanna lay.
If you decide to date her you should definitely try and get her to lose weight. The right thing to do is to encourage her or shame her (if need be) to uphold a healthier lifestyle and workout. Don't listen to the bullshit notion of "fat acceptance" or any of that nonsense.