I'm running into the problem of getting sick of eating meat. Can anyone please give me some suggestions of other forms of protein?

I know eggs, that I'm going to start working into my eating. I love bacon but don't want to eat too much, nitrates and all. Same problem with sausage. I do try to buy ground up pork and turkey, but I'm sort of getting tired of that. This is going to be come a big problem for me. I'm worried about what I'm going to do. I don't like any shell fish, so that's not an option.

Please suggest things.

Deana