Current boy

I’ve been dating this guy for 2 years.. we lost our virginity to each other, we’re very comfortable together, we do everything together, he’s honestly a good guy. But, he says its a essential to go through each other’s phones, he needs all my passwords, he doesn’t like me having girl friends because he thinks we do stuff together and I just I can’t like I’m straight, no thank you but no shame on anyone who does. And sometimes I feel like we shouldn’t be together.. like sometimes I doubt being with him.. and i know it may sound bad, but.. I don’t want to mess up if its-meant to be.. or make a big mistake, like I do love him, and I wouldn’t & couldn’t ever purposely hurt him but mentally I’m not okay anymore.. I’m not the same as I used to be and it’s not because of him but I just idk I’ve changed so much.. and I’m not happy most of the time, I’ve gained a lot of weight, I’m not as athletic as I used it be, I don’t have energy anymore!!! Like what is happening, anyways feel free to give your opinion on my bf, and my mental & physical health🙃