Hey
It's really good that you were able to get your thoughts off your chest. I don't think TMI would apply to anyone here!
I understand that you wouldn't want to tell him how worried you are. I don't think it would help to tell him that because maybe the root of your worry is that you want to feel more attractive. I think you have good motivation.
As a guy, I do think it would be a great idea to tell him how excited you are about your weight loss goals so that he can share in the excitement. I love it when my partner asks me to help her with anything, maybe he is the same. It's amazing to feel like you are achieving something together and you will both enjoy the journey together far more.
Liam Harris