If you are still losing weight, then you are still changing and with your body changes come mind changes. You are not going to be the person 20, 30, 40, or even 50 pounds into the future that you are now. Therein lies the rub.
The person you will be dating will be falling in love with you, or at least, attracted to you initially as you are now. If you are looking for that permanent committed love, then you are doing both of you a disservice. With weight loss comes changes in clothing styles and activities. You will probably be less sedentary but what will happen if you are dating a couch potato? You will definitely be growing apart.
Also you are asking someone who does not know you at all to put up with weird eating habits. Maybe this person knows about the WLS journey and that it is not an easy way out or not. We all judge based on our knowledge and some people like learning new things and some don't. They may think passing food under your nose is funny while you find it nauseating.
Save yourself some heartache and wait until you have hit goal so you can present to them the person you want to be no the one you are now. True, your eating habits will have changed little but at least you will have reached the meadow.