I certainly understand your concern about your boyfriend looking at women in a manner you feel is extreme. I agree it is a natural response to look at another person, however there are limits to what is appropriate and what is not. When a partner stares at another person multiple times or in a manner that appears to be interest it can affect the other partners self-esteem. In your case because of your past relationship history of abuse this can have a profound impact. My question to you before I can fully answer your question pertains to have you ever discussed this staring of other women with him? Has he ever explained his behavior to you?
If he does not realize he is making multiple glances at another woman, then you are right that perhaps he is authentic and truly unaware he is doing it. If aside from the glances, he is a good guy, and never gave you a reason to distrust him, is it possible because of your relationship past the glances may affect you differently had you not experienced abusive relationships. I would suggest self-talk/self-soothing options, i.e., when you see your partner making glances at another woman ask yourself does this mean anything, remind yourself another than the glances, he treats you well, and that he has given you no reason to doubt and distrust him. Sometimes we need to remind ourselves every now and again when negative thoughts emerge that there are no basis for these thoughts, he or she has given me no reason to doubt their feeling about me or the relationship. When we remind ourselves of this it lessens the future impact and or significance of the glances in the future, rendering them powerless on our thoughts and unable to affect our future.