Forbidden Crush on Her Best Friend

God, I can't keep this in anymore; I've got this insane crush on my girlfriend's female friend, and she's just so fucking hot it drives me wild. Every time I see her, my mind races with thoughts of her curves, the way her hips sway when she walks, and that wicked smile that makes my pulse pound. It's like she's got this magnetic pull, drawing me in when my girlfriend isn't looking, and I hate how guilty that makes me feel, but damn, it turns me on even more. I imagine sneaking away with her, feeling her skin against mine, tasting her lips in some hidden corner, our bodies tangled in a haze of forbidden lust. The thrill of it all is intoxicating, knowing it's wrong but craving it anyway; it's like a fire in my veins that I can't put out. My girlfriend trusts me completely, and here I am, picturing scenarios that would shatter everything, like pinning her friend against a wall and exploring every inch of her with my hands and mouth. It's messy and selfish, I know, but the secrecy, the risk, it makes me feel alive in a way I haven't in ages. I lie awake at night, torn between loyalty and this raw desire, wondering if I'll ever act on it or if it'll just eat me up inside. Fuck, I need to get this out, even if it's just in words.