Guy issues

So I'm currently in a relationship with my ex. But I don't know what to do right now.

So after him and I broke up the first time I started talking to this guy and I developed feelings for him. But I never went after him because I knew my parents wouldn't agree with his age and my age difference... And we've had some deep conversations since my ex and I got back together. The guy knows I'm in the relationship but still wants me and wants to have sex and be in a relationship with me. Is it bad that I want the same thing even tho I have a boyfriend?... aghhh I need help!!! 😖😩😩