Need advice

Hi,

So where do I begin. Sometimes my husband stays up late at night and plays video games. Well I got upset when he didnt come to bed 2 nights in a row. Then days pass since we had sex. I started to wonder so I snooped on his phone. I know that's wrong of me. So I found videos from his history. There were sexy girls in close to nothing. Basically didn't look like me. I confronted him about it, first denied it. Then said the famous line, hes a guy blah blah. I'm already insecure and this has left me feeling worse. Then drives me crazy when he looks at girls whenever we go out. I just feel like it's so disrespectful. I dont know how to get passed this.