<human>: I've been an acquaintance of this guy for a few years and about 2 months ago we started hanging out and our friendship evolved incredibly fast. We became best friends instantly. He flirted with me, gave me all the signs, I was convinced it was going somewhere. I come clean about my feelings, find out he has feelings for another girl, he wants to stay "platonic". Well, he doesn't act any different, all of our friends think we act like a couple and have speculated that something's going on.

 I need to set boundaries with him because I've fallen completely in love with him and don't know how to go about this whole situation. Especially since he has a girlfriend now and he obviously really cares about me, he acts and tells me all the time. So how do I set boundaries without tainting our friendship?

Can you give me a shortened version of the text?
<bot>: got friend zoned by best friend, guy acts like he is into me, has a girlfriend, i'm in love don't know how to cut him off without ruining our friendship.