I'm going to go through my boyfriend's phone if I find something in his wallet.
Why would you go through his phone?
If I find a reason, then I just take it as a fact that he is cheating and look at his phone.
It's wrong to go through your bf's phone behind his back. You should just have an honest conversation with him.
I'm a girl and I can do whatever I want.
It is normal to feel suspicious about your boyfriend cheating but you shouldn't look through his things. You should really talk about it otherwise it will cause problems and he might end the relationship because you went through his things.