secret lover

so i have been seeing someone on the side and its this intense thing we havent told my partner yet it started as a game of trust but now it feels so real like shes my whole world and im scared because i still love my partner but sometimes when i think about leaving everything for her it just all makes sense. yeah we hook up at her place or in hotel rooms never get caught or anything but the sex is off the charts its hard to explain how good she is. so anyway like what if this was meant to be and im not being unfaithful just exploring my feelings honestly feels liberating but also really guilty and i dont want my partner to ever find out it would break her heart