Unrequited love

Hello, I have a great boyfriend. Kind , loving , patient , caring the list goes on! He loves me dearly and would do anything for me and we get on well. However, I still chat regularly to my ex boyfriends friend who I was and still am attracted to! He messages me still and charms and I just can’t resist him. I want the thrill and excitement and there is such sexual chemistry but I feel he just uses me for the chase and enjoys the attention but I can’t help but have growing feelings for him. Should I tell him or let him go? Should I end it with my bf if I’m not 100% satisfied .

Hi, Were you already regularly chatting to your ex's friend when first you met your current boyfriend? How long since you and your ex broke up have you and he been in communication? And how soon after you broke up did this chatting begin? Also, who initiated it - and based on what justification or pretext?