I had my bypass almost a year ago, I eat out at least 3 times a week, your life isn't over. I went to a do last week where they served a four course meal! I ate the tomato off the starter, a slice of beef and some veg from the main and the raspberries off the white choc cheesecake from the dessert. The men on the table were more than happy to eat my leftovers. Just because i now have a small appetite doesn't mean I can't live like any other normal person. I am going away next weekend to a hotel offering bed breakfast and evening meal. I just don't eat as much as hubby! I tend not to order main course if i go out for an ordinary meal, I just explain that I don't eat much and is it ok to order a starter and have it when others have their main, or I have a few bites of whtever hubby is having. No one bats an eyelid. I had a few odd looks when I was still massive, I think they were thinking "small appetite!!! Who is she kidding!!" lol.
I know some do have problems with being sick if they over eat, but not everyone. I haven't been sick at all since my op, if I over eat I just feel very uncomfortable! A walk and a drink gets rid of the feeling though. Stop worrying and start living again I say.
Good luck xx