I want to tell my girlfriend how amazing she would look if she worked out with me
I doubt she wants to join you. Do you think that can convince her?
Yes it will, I am trying to get her healthy.
It is good for people to tell their opinions to others when they ask a question. You should be kind when you say it so she doesn't get too offended by the suggestion.
I don't give a shit if she gets offended, I will say it anyways and if she ends up in tears she will go to the gym. It's about her health anyway.
Weight my be a real touchy subject for her is what I was saying. Ultimatums don't work so you should maybe buy her a membership and if she wants to use it not dictate how she does.