is my husband cheating

So yesterday he left his phone on the table, and I grabbed it when a text piped up and he snatched it from my hand to read it and when I went to grab his phone again he moved away with his phone... and O de he knew I was mad then he was like, "here have my phone" if you have nothing to hide then why snatch your phone and then wait to read what ever it was then want to give me your phone... then I lock myself in my closet just to get a breather and he was like, I will print you my phone bill so you can see but I told him forget it.... what do you guys think?