Relationships with non-believers

[Translation from Italian to English]

Hi! My name is Adriana, I’m 25 years old, and I’m Italian. I’m a believer.

I’m writing to you because I need your advice regarding a 24-year-old stranger. He told me I was beautiful, and we contacted him without knowing each other.

But actually, I have a problem with a non-believer: there are reasons why I can’t be together if I have a problem. I’m a believer and I was confirmed in a Catholic church.

I’m worried about this because I fear denying my faith or sinning if I cheat with a non-believer.

So, if you’re true Christians, I need your advice. What should I do with a non-believer? Can I be together or should I refuse?