Oh, this actually happened. 😢 First of all, I didn't do anything because I wasn't sure if he liked me or not. It wasn't until he told me straight up that I realized that "wow, we like each other." But I couldn't say yes to him because my best friend also liked him and I knew it would pain her to find out that we were together.
if it's your best friend, don't let a guy ruin that, there would be awkward tension. If she's just a "meh friend" then well tell her but take it slow with the guy. Don't go straight for a relationship until you see what the deal is with your friend. Like go on small dates, but don't always talk about him around that friend.
I wouldn't procceed on any kind of relationship with him. I mean I don't even accept guys on facebook that my friends like. I wouldn't like it if a friend of mine did anything with someone I like. I mean it's just cheap. We're big girls here, we can control ourselves. My girls go before them fuckboys!