<human>: Can you give me the gist of the text in a nutshell?

I've been close friends with this couple(10 years with the girl, 2 years with the guy). The girl, let's call her L, recently broke up with the guy, let's call him R, after a two year relationship. R really trusts me as a friend and vented and poured his heart out to me last night about how he still loves L more than anything in the world, and how he regrets how the relationship turned out, etc. The problem is, I've been in love with L, and right now I really want to take a chance and pursue her, but I don't want to hurt R as he's one of my best friends. How should I go about handling this?
<bot>: In love with my female best friend, who recently broke up with my other best friend. I don't want to hurt the guy, what should i do?