Every time I try to fantasize about my girlfriend my mind drifts to my ex.

She was less attractive but the sex was arguably better. We understood our bodies and both came easily.

This ex I am very sure still has feelings for me and I could probably sleep with her within a few weeks of breaking no contact.

My girlfriend wants to marry me and have kids (so did my ex lol) so I know if she were to find out she’d be devastated. But she has said that she would forgive me if I cheated on her because I’m just so great. Of course I always say I’d never cheat on her but honest to god every night when I fantasize, it’s about my ex.

Should I break no contact?