is it just me...

Ok so I'm wondering if I'm just over reacting. So my boyfriend is always looking at other women when were together.  We have been together for a long time and i have asked him to not do that because its disrespectful to me. I'm not jealous I don't mind or care that he looks when I'm not with him, its when I'm with him and he still does it that upsets me. He has never cheated on me,but he does it so constant and its so obvious that we can be having a conversation and i have to repeat myself because he was too busy looking at someone walking by.