I deleted my ex off fb, was it the right choice? he texted me after I did it, I feel bad...?

So my ex dumped me 3 weeks ago now... (I still don't know why) Anyway he called a few days after to suggest being friends and was checking to make sure "I hadn't done anything stupid" ? Anyway I said I wasn't sure about friendship, since then we didnt contact eachother, other than him liking some FB stuff. I bumped into him two days ago and he saw me and said "smile" Later that day I text him to say I was sorry I didn't speak to him but I didn't know how to react. He didn't reply.... I decided to deactivate FB for a bit to stop looking at his page, but he must've thought I'd deleted him because he texted me at 2am saying "Sorry, don't worry I'll avoid from now on"
Now I feel terrible! like I am the mean one... I was gonna delete him anyway to move on as it hurts, but did I make the right choice ?