Shez I am the same. With friends, bfs, and now husband (soon to be ex?). I have always been extremely insecure and whenever a bf would look at another girl, talk to another girl, I would definitely think they wanted her instead of me. And I have said that to them, followed by the pleading not to leave, manipulating them into staying or doing what I want.. Gosh.. I can totally relate and you and carm are not alone in that