Hi Megan, and congrats on making the decision to change your life for the better with this wonderful surgery.
As for the vegetarian diet, I have a dear friend who is vegan, and she suggested using tempeh, and seitan for Protein instead of meat. I never did get around to trying any of the recipes, but I posted a thread on here that I can forward to you with a lot of different recipes that you'll be able to use once you get to the mushy and soft solid diet.
If you have head hunger issues, I highly suggest that you seek out a therapist or counselor that is experienced in food addictions, and diet management. None of the surgeries will cure your head hunger completely. Will the sleeve help control your actual hunger? Yes, but if you just want to eat to eat then you will not be as successful as you could be. The sleeve does indeed help with portion control because if you overeat, you will regret it. You will feel discomfort, sometimes pain, and vomiting can occur if you constantly overdue it.
I am very rarely hungry. With that said, I have to actually have a reminder on my IPhone go off so I can remember to eat. I ate about 3/4 of a beef eggroll with soy sauce around 3pm this afternoon, here it is 7:45pm, and I have zero appetite. But, I know that I need to eat something for dinner. Food is simply fuel for my body now. I was a volume eater, and could eat A LOT. Now, I simply eat because I have to, and not because I'm bored, or stressed.
No one can answer the question " can I stick with this?" for you, that has to be your decision. The sleeve is nothing more than a tool to help you succeed. You have to be willing to sacrifice a little in the beginning, and know that the weight will come off if you're willing to follow your surgeon's post op diet, and overhaul your entire relationship with food. For me, I truly do not feel like I'm on a diet constantly. I eat less than my 11 yr old son (who is lean, petite, and muscular), but the best part of it is that I am satisfied with very little portions now. I eat anything and everything that I choose.
I wish you the very best in your journey, and you'll be a success. You just have to put your "best foot forward", and get mentally, emotionally, and physically prepared for this life-changing event.