I love my boyfriend but I can’t trust him?

My boyfriend says he loves me too and we see eachother almost everyday. I don’t trust him because when we were out a few times I saw him staring at girls. One time he just sat there and stared at some librarian. Also when we were in a crowd he would always sit beside the most attractive girl. But when I talk to him about it he says he honestly doesn’t.

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Also to add he’s very attractive. And older women at his work gives him food and small gifts
I love my boyfriend but I can’t trust him?
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