My BF, his Bestie, Me & Snapchat

My BF recently reconnected with his Best Friend from HS. We all know each other, went to the same HS. I’ve been struggling with the idea that I might be jealous? I feel SO TERRIBLE for saying that! I think what did was—I’m no longer my BF’s TOP FRIEND on Snapchat... I KNOW. Super immature.

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The real deal is my BF has been spending more time with his friend than me. We don’t even talk since the friend showed up. How do I tell him without sounding jealous, immature, crazy, etc?!