Butterflies

Soooo I met this guy at work (I’m a cashier) and i fell for his smile first. He does think that made me think he likes me too. Then I found out that he has a girlfriend. He comes into my work very often and i get butterflies every time I see him and I feel like I fall for him more each time. But I know it’s wrong and I want to stop because he has a girlfriend and I don’t want to disrespect either of them or cause any issues. Well I tell myself to stop feeling this way but then I see him and can’t help it. I really can’t avoid him. Idk what to do. 😢💔 (p.s. please don’t be rude. i do not flirt with him!!)