Boyfriends curious eyes😔 sorry I need to vent ( long story)

So me and my SO had a huge fight a day or two ago, but some back story we went to a small town together to get stuff we needed for ourself, we walked into this store to get drinks while we were at the counter to pay two girls walk in and talk to the other lady that was helping us and one of the two girls asked the lady how she looked (she was wearing a cardigan with a tight shirt with her cleavage showing like they were about to jump out) while they were talking I looked and my so check her out.. Right in front of me... It hurt me so damn much.. I held it to myself for a while till he noticed I wasn't in a good mood anymore so he made me tell him what was wrong so I told him I constantly see him checking out other females while we're going somewhere together.. He didn't deny and he said sorry.. But I was still so hurt I felt like crying.. He knows how insecure I am and how much I hate it when he looks.. So a few hours later I was still pissed and he forced it out of me I exploded on he and started crying.. We fought over this once I told him how much I hate it and how much it hurts me when he does.. Then stupid me asking questions I don't want to know. I asked him if he constantly looks at other girls and he said he does.. I knew if he would lie or not cause I catch him a lot.. But he claims he "doesn't think of anything" while he's checking them out... It's been days since and I still feel like shit. But I love him so much but he still has the nerve to keep looking when he knows I hate it and I'm so insecure about every part of me. I don't know what to do.