Holby City Fans- Who is jac naylor?

My sister and me had an argument today, i love my ex boyfriend so much but i cant help messing up and pushing him away, i don't have many friends cause i just screw things up with them because i just hate everything, she said i don't care if i hurt people along as im okay (which is not true), she said i remind her of jac naylor from holby city, ive never watched holby city, who's jac naylor?