will I ever want another sex partner..

Okay so I was a virgin when I was married , almost 3 years ago and we have been doing great I'm more happy then ever but my friend was talking today how she wants more out of her relationship she wants some other man someone else to have sex with , we both have only had sex with one man and I don't ever want to feel this I love my husband and I just don't want to feel like he isn't enough has anyone ever been through wanting another man because you've only ever Been with one.