Is this wrong? honest opinions please!!!?

So i have been thinking about my ex a lot, was just wondering how he is doing... so i got hold of him, and we started talking a bit... i have no intention of getting back together, i just simply care about him in a friendly way... my bf at the moment would be FURIOUS if he knew... :( how do i juggle between the two? i am so much in love with my bf now... i just feel bad for not telling him i got in contact with ex, because i know he would be so mad... have any HONEST ADVICE to give?