Why don't I feel right being engaged and living together?

I just moved in with my fiance. I moved to another state. I feel out of sorts. I'm not sleeping well since we have different sleeping patterns. I am always tired now and nod off during the day to catch up on sleep. We eat out too much. Before I ate healthier, but in this small town people love to serve you large portions. I'm a vegetarian and family members try to persuade me to eat beef. His mother hates to see me doing this to myself being a vegetarian, but she is very overweight. Plus I am not exercising like I should. I still need to unpack and am suddenly unmotivated to do so. My fiance has curbed his roving eye although I still catch him. That has been an issue throughout our dating. It was very blatant. Now for some reason, I don't care. I got tired of crying, being hurt by that behavior, but now I have seemed to throw up a wall to protect myself from it and have stopped crying. My cat meows at the entryway like he wants to escape. I feel so guilty about that. We have him in another part of the house at night when the windows are open. My fiance likes fresh air. Otherwise my cat claws at the screens. He is use to curling up with me at night and I sleep better that way. I miss that. I will "never" declaw my cat either. I don't feel I can be myself. It's been hard for me to adjust. I miss my friends and time. I liked it when I could have my own schedule and do what I wanted when I wanted to. Although my fiance is not restricting me. I feel homesick for my family. I'm all knotted up inside.