Um.

Dear Undisclosed Person #3,

Wow you must be incredibly thick. Must is the wrong word, you ARE incredibly thick. How much more obvious can a person get about something like this? Clearly not obvious enough. You say we're "really good friends" but I'm finding that hard to believe as of late, because if we were and if you really cared about me at all, you would've told me about your girlfriend. I thought we were close too, but looks like I may have been mistaken. I am glad that you know I won't be wasting my time to visit you because I'm not one to put myself in awkward & uncomfortable situations. Not like you even deserve to see me after all this. Once you learn how to communicate with people better, maybe we'll be alright. You just really know how to fuck things up.