<human>: Condense the text into a few key points

Let me start off by saying that this is my own fault. It's not stupid until you get into something like this, though.

Basically, I have two personalities (They're not completely separate entities, don't get me wrong. I can differentiate the two, and of course, my male personality is what I use most of the time). One's a guy, one's a girl. We'll call them Keith and Summer. They don't swap out at all, really, but I generally use the female personality on the internet. I've even gone so far as to use a voice changer to uphold it. I've casually strolled through the actions for the last few years, Summer taking over occasionally when I get online. It's a very just personality, very kind, loving, et cetera. I met a girl through a couple of Summer's friends some time ago, and we both enjoy the other's company. Generally hanging out and chatting whenever she's around. We'll call the girl Cat. Everything's all fine and dandy, and we're growing to be great friends, but the issue is that Cat has a crush on Summer, and every part of me has a crush on Cat. Both parties know that the other is attracted to them, and I've a feeling it'll be acted on soon. Obviously, I'm not a girl in real life, and Cat has no idea I'm not. She thinks I'm still her lovely Summer. Keith and Summer both have basically all the same traits, with Summer obviously being more girly and.. That's pretty much it.

I'm rather worried that I messed this up bad, because I do think I'm in love with this fine girl. She's one of the kindest, most caring people I've ever met, her voice is gorgeous, her laugh is adorable, I basically just enjoy her all around. I know I can't stall forever (Haven't had to yet), I know I'll have to tell her at some point. I'm just curious as to how I should approach the situation when I feel it's right. I don't want to lose her, but I fear it's inevitable currently.
<bot>: I have two personalities, one male one female, girl fell in love with female personality, love her back, actually male irl, what do?