Is it a red flag if he stares at other women?

Been friends for 5 years and just started dating a month ago. We’re both 24.
A week before we started dating, we had a slight fall out as he flirted with a barista girl and got two free coffees and then denied that he flirted with her yet I was standing right there and saw it all.
Just last night he was close to hitting a car in front of him because he had to check out a girl standing by her car… had to last minute brake hard.
We’ll be out at the mall and he’ll be checking girls out or even when we go get dinner ect…
He’ll like stand and watch them sometimes and it’s embarrassing when the girl looks back at us.
I don’t feel pretty enough or at all for that matter… self confidence is completely gone… and I feel like I’m on the verge of a breakdown because of it. I’m nothing like the girls he looks at or watches.
In the 5 years of friendship he did see several girls, maybe about 3-4 girls a year, maybe more that I don’t know of.
I’m moving overseas for a year and we had a fall out as he said once I move, I’ll end up telling him about another guy I’m seeing so I said no that will be him and I told him about some guys from my past, hitting me up and how i brutally turned them down and then he slept in the lounge🙃
Is it a red flag if he stares at other women?
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