My girl is getting married and i regret it

Throwaway for obvious reasons.
I’ve been kind of dating this girl for the past 2 years. Nothing official because of family/circumstances, but we were really close. I took her virginity and she took mine. We fucked 6-7 times — hard, merciless, no holding back. Her body is insane, that tight pink pussy… man, I still remember every single time.
Now her parents have arranged her marriage. She’s going to be someone else’s wife soon. I can’t stop it. I’m not financially stable enough to step up and commit the way her family wants right now. I know that’s on me.
But the thought of another man claiming her, sliding into that same pussy I broke in, grabbing those hips, making her moan the way I did… it destroys me. I feel this deep sadness, like I’m losing something irreplaceable. At the same time, it makes me so fucking horny I can’t think straight. Jealousy and arousal mixed together is messing with my head bad.
I don’t know what to do with these feelings. Part of me wants to tell her not to go through with it. Part of me knows I had my chance and blew it. Mostly I just keep replaying memories of railing her while knowing some other guy is going to be doing it for the rest of her life.
I hv asked her to lemme do het once n record it frvone last time before she gets her engagement function!
Has anyone else been in this spot? How do you deal with it?