Change can be really hard. Remember that a new situation may be hard for her too. Be gentle with her heart and your own and maybe you can find a way to communicate. In my relationship, when we’ve had a feeling of distance that crept in, doing something fun together often helped resolve it - even something silly like a picnic or a scary movie. It’s corny, but “if you want me to be closer to you, get closer to me.”. What’s the consequence if she finds tinder on your phone? Is it worth that? She’d rather think you’re insecure about her than indifferemt. Good luck. I hope things turn around and settle in for you guys.