I fucked up /.\

So my ex was my first and the guy I'm with now is the first guy I've been with since I was with my ex and I messaged my ex because we where together for a long time and I was curious about how he was doing and what not (completely friendly) and so we texted back and forth for just alittle bit. No damage done expect I told my bf that I messaged him and I'm now finding my self explaining how I don't love my ex anymore to my bf.. what bf thinks I never loved him and now I feel like he might brake up with me over something that meant nothing ?