ex bfs/gfs

so... I'm still MADLY in love with my ex (things ended years ago, not my decision, but we still talk) and I literally can't move on properly, because no one measures up to him...and we still "talk" *coughcough*

buuuuut.... he has a gf.......

am I a terrible person, or can anyone relate... or shake some sense into my head, because clearly I'm a complete weakling.