Caught in My College Open Relationship Web

I've been in an open relationship with my girlfriend since we started dating three years ago. We agreed on it to avoid jealousy and keep things fun, but I never expected it would lead me down this path. Last week, after a particularly tough day at uni, I was feeling vulnerable and decided to meet up with Alex, one of the other guys in our non-monogamous circle. We'd flirted for months but always kept it friendly and light-hearted. That night though, everything changed. Alex came over, we shared some wine, talked about life...then things escalated quickly. He undressed me slowly, his hands exploring every inch of my skin. I could feel the anticipation building as he pulled me close and kissed me passionately. Our tongues danced together, entwined in a heated exchange that left both of us breathless. Soon enough, we moved to the bedroom where the real fun began. Alex lay on top of me, his muscular body pressing against mine as he entered me slowly, inch by inch, filling me up completely. I wrapped my legs around him, pulling him deeper inside with every thrust. The friction sent electric sparks shooting through my nerves, igniting a wildfire of pleasure that consumed me entirely. We continued like this for what felt like hours, deep, passionate thrusts followed by moments of rest where we gazed into each other's eyes, panting and sweating from the exertion. Finally, after reaching an explosive climax together, I lay there trembling in Alex's arms, completely spent but also exhilarated beyond words. It was one of those experiences that can't help but make you think afterwards, about boundaries, commitment, the nature of relationships altogether. I know I'm lucky to have such freedom and exploration with my partners, but sometimes it feels like too much choice leads to even more confusion.