Love & sex

Petula

I have been friends with this guy for over 16 years ... we met at work and hung out in a group . We have always kept in touch after the group split up .... mainly him ... he has always called me and visited me for lunch ... one day he ask me out and I accepted , i told him I like out friendship and didn’t want to ruin it, we started a sexual relationship, I have sept with him during all my relationships and so has he , even when he got married ... now I want to end it ... I don’t see this going anywhere and I want it to stop .. I know ... years later 😞, I try telling him I want this to end , at first it was an addiction ... but now ... he just ignores me when I bring it up !!! Advice ?? I know I have a lot of fault here ! 😞